Test Bank For Modern Hydronic Heating For Residential and Light Commercial Buildings, 4th Edition by

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Test Bank For Modern Hydronic Heating For Residential and Light Commercial Buildings, 4th Edition John Siegenthaler Chapter 1-15 Chapter 01: Fundamental Concepts 1. Hydronic heating systems use water (or water-based solutions) to move thermal energy from where it is produced to where it is needed. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 1 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 5:22 AM DATE MODIFIED: 7/25/2022 5:24 AM 2. Ideally, the water in a hydronic heating system remains in the system year after year. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 1 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 5:24 AM DATE MODIFIED: 7/25/2022 5:25 AM 3. Providing comfort is the primary objective of any heating system designer or installer. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 3 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 5:25 AM DATE MODIFIED: 7/25/2022 5:25 AM 4. Properly designed hydronic systems control both the air temperature and surface temperatures of rooms to maintain optimal system water level. a. True Copyright Cengage Learning. Powered by Cognero.

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b. False ANSWER: False POINTS: 1 REFERENCES: 3 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 5:25 AM DATE MODIFIED: 7/25/2022 5:26 AM 5. Maintaining comfort is simply a matter of supplying heat to the body. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 3 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 5:26 AM DATE MODIFIED: 7/25/2022 5:27 AM 6. A properly designed and installed hydronic system can operate with virtually no detectable sound levels in the occupied areas of a home. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 6 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 5:27 AM DATE MODIFIED: 7/25/2022 5:27 AM 7. All heating systems consist of devices that convert one form of energy into another. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 8 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 5:28 AM DATE MODIFIED: 7/25/2022 5:28 AM 8. Thermal radiation is probably the most understood mode of heat transfer.

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a. True b. False ANSWER: False POINTS: 1 REFERENCES: 11 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 5:28 AM DATE MODIFIED: 7/25/2022 5:29 AM 9. The simplest hydronic system can be described as a loop or piping circuit. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 13 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 5:29 AM DATE MODIFIED: 7/25/2022 5:29 AM 10. In single-loop systems, the flow-check valve allows hot water in the boiler to slowly circulate through the distribution system when the circulator is off. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 16 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 5:29 AM DATE MODIFIED: 7/25/2022 5:30 AM 11. Water has many characteristics that make it ideal for a hydronic system. It is readily available, nontoxic, nonflammable, and has one of the highest ____ storage abilities of any material known to man. a. liquid b. Vapor c. molecular d. heat ANSWER: d POINTS: 1 REFERENCES: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False Copyright Cengage Learning. Powered by Cognero.

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DATE CREATED: 7/25/2022 5:31 AM DATE MODIFIED: 7/25/2022 5:32 AM 12. Early hydronic systems did not have circulators. Instead, they relied on the ____ of hot water to move water between the boiler and the heat emitters. a. molecular attraction b. thermonics c. buoyancy d. hydraulics ANSWER: c POINTS: 1 REFERENCES: 2 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 5:32 AM DATE MODIFIED: 7/25/2022 5:33 AM 13. Buildings with hydronic heating systems have shown ____ heating energy use compared to equivalent structures with forced-air heating systems. a. lower b. higher c. equal d. unquantifiable ANSWER: a POINTS: 1 REFERENCES: 4 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 5:33 AM DATE MODIFIED: 7/25/2022 5:34 AM 14. A given volume of water can absorb over ____ times more heat as the same volume of air for the same temperature change. a. 30 b. 300 c. 340 d. 3400 ANSWER: d POINTS: 1 REFERENCES: 6 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 5:34 AM DATE MODIFIED: 7/25/2022 5:35 AM Copyright Cengage Learning. Powered by Cognero.

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15. Heat is our perception of atomic vibrations within a material. Our means of expressing the intensity of these vibrations is called ____. a. harmonics b. temperature c. cellular reaction d. tuning ANSWER: b POINTS: 1 REFERENCES: 8 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 5:35 AM DATE MODIFIED: 7/25/2022 5:35 AM 16. Heat emitters that use fans or blowers to force air through a heat exchanger are usually called fan coils or air ____. a. baffles b. tunnels c. handlers d. blowers ANSWER: c POINTS: 1 REFERENCES: 11 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 5:36 AM DATE MODIFIED: 7/25/2022 5:36 AM 17. All hydronic heating systems will inherently attempt to find a point of ____ and remain in operation at that point. a. thermal equilibrium b. even hydraulic flow c. thermal comfort d. customer comfort ANSWER: a POINTS: 1 REFERENCES: 13 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 5:36 AM DATE MODIFIED: 7/25/2022 5:37 AM 18. In an ideal application, the rate of heat production by the heat source would ____ the rate of heat by the heat emitters. a. never match b. exceed Copyright Cengage Learning. Powered by Cognero.

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c. remain lower than d. exactly match ANSWER: d POINTS: 1 REFERENCES: 14 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 5:37 AM DATE MODIFIED: 7/25/2022 5:38 AM 19. In single-loop systems, the ____ prevents hot water in the boiler from slowly circulating through the distribution system when the circulator is off. a. diaphragm b. flow-check valve c. power switch d. up-flow valve ANSWER: b POINTS: 1 REFERENCES: 16 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 5:38 AM DATE MODIFIED: 7/25/2022 5:39 AM 20. An air separator is designed to separate air from water and eject it from the system. The process is ____ the water is heated. a. more difficult if b. enhanced as c. not affected if d. unnecessary if ANSWER: b POINTS: 1 REFERENCES: 17 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 5:40 AM DATE MODIFIED: 7/25/2022 5:40 AM 21. The emergence of electrically powered____ made it possible to move water at higher flow rates through much elaborate piping systems. a. separators b. motors c. strainers d. circulators Copyright Cengage Learning. Powered by Cognero.

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ANSWER: d POINTS: 1 REFERENCES: 2 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 5:40 AM DATE MODIFIED: 7/25/2022 5:41 AM 22. Modern controls can maintain room air temperature +/- ___ °F of the desired setpoint temperature. a. 1 b. 2 c. 5 d. 7 ANSWER: a POINTS: 1 REFERENCES: 3 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 5:42 AM DATE MODIFIED: 7/25/2022 5:42 AM 23. Hydronic systems that transfer the majority of their heat by thermal radiation reduce air temperature____ and thus reduce heat loss through ceilings. a. normalizing b. vaporization c. stratification d. drops ANSWER: c POINTS: 1 REFERENCES: 4 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 5:43 AM DATE MODIFIED: 7/25/2022 5:44 AM 24. Heat always moves from an area of____ temperature to an area of____ temperature. a. lower, higher b. higher, lower c. dry-bulb, wet-bulb d. cold, heat ANSWER: b POINTS: 1 REFERENCES: 9 QUESTION TYPE: Multiple Choice Copyright Cengage Learning. Powered by Cognero.

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HAS VARIABLES: False DATE CREATED: 7/25/2022 5:44 AM DATE MODIFIED: 7/25/2022 5:45 AM 25. When fluid motion is caused by either a circulator, blower, or fan, the resulting heat transfer is more specifically called______. a. forced convection b. power convection c. solid convection d. super convection ANSWER: a POINTS: 1 REFERENCES: 10 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 5:45 AM DATE MODIFIED: 7/25/2022 5:46 AM 26. The main difference between thermal radiation and visible light is the___ of the radiation. a. prism b. spectrum c. color d. wavelength ANSWER: d POINTS: 1 REFERENCES: 11 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 5:46 AM DATE MODIFIED: 7/25/2022 5:47 AM 27. The term___ radiant temperature describes the area-weighted average temperature of all surfaces within a room. a. mean b. prescribed c. effective d. steady-state ANSWER: a POINTS: 1 REFERENCES: 12 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 5:47 AM DATE MODIFIED: 7/25/2022 5:48 AM Copyright Cengage Learning. Powered by Cognero.

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28. An air separator is designed to separate air from water and eject it from the system. The process is ____ the water is heated. a. more difficult if b. enhanced as c. not affected if d. unnecessary if ANSWER: b POINTS: 1 REFERENCES: 17 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 5:48 AM DATE MODIFIED: 7/25/2022 5:49 AM 29. The difference in energy use by various heating and cooling distribution systems can be quantified using the concept of__________. a. relative efficiency b. combined efficiency c. heat water efficiency d. distribution efficiency ANSWER: d POINTS: 1 REFERENCES: 17 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 5:49 AM DATE MODIFIED: 7/25/2022 5:50 AM 30. Distribution efficiency (Btu/h/watt) is equal to the “rate of thermal energy delivery by distribution system (Btu/h)” ____ the “electrical power required to operate distribution system (watt).” a. totaled with b. subtracted from c. divided-by d. multiplied-by ANSWER: c POINTS: 1 REFERENCES: 17 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 5:50 AM DATE MODIFIED: 7/25/2022 5:52 AM

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Chapter 02: Space Heating and Domestic Water-Heating Loads 1. The design heating load of a building is an estimate of the rate at which a building loses heat during the near minimum outdoor temperature. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 21 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 5:58 AM DATE MODIFIED: 7/25/2022 5:58 AM 2. One can assume that individual room heating loads are proportional to room floor area. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 21 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 5:58 AM DATE MODIFIED: 7/25/2022 5:59 AM 3. The R-value of a material is directly proportional to its thickness. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 23 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 5:59 AM DATE MODIFIED: 7/25/2022 5:59 AM 4. Many residential and commercial buildings have concrete floor slabs rather than crawl spaces or full basements.

Downward heat losses are relatively large from interior areas of the floor slab. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 29 QUESTION TYPE: True / False HAS VARIABLES: False Copyright Cengage Learning. Powered by Cognero.

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Chapter 02: Space Heating and Domestic Water-Heating Loads DATE CREATED: 7/25/2022 5:59 AM DATE MODIFIED: 7/25/2022 6:00 AM 5. The U-value of any material or assembly is simply the reciprocal of the R-value of that material or assembly. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 32 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 6:00 AM DATE MODIFIED: 7/25/2022 6:01 AM 6. Heat from a basement or slab-on-grade foundation is not determined by complex interactions between the building, the surrounding soil, insulation materials, and air temperature above grade. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 26 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 6:01 AM DATE MODIFIED: 7/25/2022 6:01 AM 7. It is relatively impossible to assess the location and magnitude of all the air leakage paths in a typical building. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 33 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 6:01 AM DATE MODIFIED: 7/25/2022 6:02 AM 8. The number of heating degree days that accumulate in a 24-hr. period is the difference between 65 ºF and the average outdoor air temperature during that period. a. True b. False ANSWER: True POINTS: 1 Copyright Cengage Learning. Powered by Cognero.

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Chapter 02: Space Heating and Domestic Water-Heating Loads REFERENCES: 42 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 6:02 AM DATE MODIFIED: 7/25/2022 6:03 AM 9. The seasonal efficiency of the heat source is also factored when determining the unit price of delivered energy. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 45 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 6:03 AM DATE MODIFIED: 7/25/2022 6:03 AM 10. An important aspect of domestic water-heating loads is the peak hourly demand. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 48 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 6:03 AM DATE MODIFIED: 7/27/2022 4:23 AM 11. The heating load is ____ of heat flow from the building to the outside air. a. a rate b. the quantity c. the cost d. one unit ANSWER: a POINTS: 1 REFERENCES: 21 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 6:04 AM DATE MODIFIED: 7/25/2022 6:05 AM 12. The proper approach is to perform a heat load calculation ____. a. factoring seasonal requirements Copyright Cengage Learning. Powered by Cognero.

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Chapter 02: Space Heating and Domestic Water-Heating Loads b. for each room c. for the entire building d. based on the owner’s usage ANSWER: b POINTS: 1 REFERENCES: 21 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 6:05 AM DATE MODIFIED: 7/25/2022 6:06 AM 13. An object’s thermal ____ can be defined as its thickness in the direction of heat flow divided by its thermal conductivity. a. reactivity b. representation c. reciprocity d. resistance ANSWER: d POINTS: 1 REFERENCES: 23 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 6:06 AM DATE MODIFIED: 7/25/2022 6:07 AM 14. Heat flow from a basement or slab-on-grade foundation is determined by complex interactions between the building, the surrounding soil, insulation materials (if present), and the ____. a. depth of the foundation b. orientation of the structure c. exterior foliage d. air temperature above grade ANSWER: d POINTS: 1 REFERENCES: 26 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 6:07 AM DATE MODIFIED: 7/25/2022 6:08 AM 15. All building surfaces that separate heated space from unheated space. (walls, windows, ceilings, doors, foundation, etc.) are called the ____ of the building. a. isotherms b. heat load variables Copyright Cengage Learning. Powered by Cognero.

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Chapter 02: Space Heating and Domestic Water-Heating Loads c. resistance factors d. thermal envelope ANSWER: d POINTS: 1 REFERENCES: 32-33 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 6:08 AM DATE MODIFIED: 7/25/2022 6:08 AM 16. The U-value of any material or assembly is simply the reciprocal of the ____ of that material or assembly. a. R-value b. temperature c. exposure d. thickness ANSWER: a POINTS: 1 REFERENCES: 32 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 6:08 AM DATE MODIFIED: 7/25/2022 6:09 AM 17. In addition to conduction losses, heat is also carried out of buildings by uncontrolled air leakage. This is called ____ heat loss. a. anti-thermal b. air volume c. insulation d. infiltration ANSWER: d POINTS: 1 REFERENCES: 33 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 6:09 AM DATE MODIFIED: 7/25/2022 6:10 AM 18. One common method of factoring local weather conditions into estimates of heating energy use is based on heating ____. a. thermos b. degree days c. historical records d. air changes Copyright Cengage Learning. Powered by Cognero.

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Chapter 02: Space Heating and Domestic Water-Heating Loads ANSWER: b POINTS: 1 REFERENCES: 42 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 6:10 AM DATE MODIFIED: 7/25/2022 6:11 AM 19. Once the____ price of the fuel options has been calculated, a simple multiplication determines the estimated seasonal heating cost in dollars. a. unit b. sliding c. advertised d. estimated ANSWER: a POINTS: 1 REFERENCES: 45 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 6:11 AM DATE MODIFIED: 7/25/2022 6:12 AM 20. To estimate the annual space heating cost provided by an electrically operated heat pump, its average COP must be factored in. What does COP stand for? a. correlation of production b. coefficient of performance c. calculation of price d. correlation of parts ANSWER: b POINTS: 1 REFERENCES: 45-46 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 6:12 AM DATE MODIFIED: 7/25/2022 6:12 AM 21. The rate at which domestic hot water is used at the fixtures within a building varies considerably with the type of ____, and the time of day. a. water meter b. occupancy c. tank d. piping ANSWER: b Copyright Cengage Learning. Powered by Cognero.

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Chapter 02: Space Heating and Domestic Water-Heating Loads POINTS: 1 REFERENCES: 47 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 6:13 AM DATE MODIFIED: 7/25/2022 6:13 AM 22. All electric, gas, and oil-fired storage type water heaters sold in the United States have a _____. a. first-hour rating b. second-hour rating c. 24-hour rating d. 12-hour rating ANSWER: a POINTS: 1 REFERENCES: 48 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 6:13 AM DATE MODIFIED: 7/25/2022 6:14 AM 23. To compensate for the effect of internal heat gains, and warm-weather degree days, ASHRAE devised a correction multiplier known as _____. a. mechanical factor b. value factor c. performance factor d. Cd factor ANSWER: d POINTS: 1 REFERENCES: 43 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 6:14 AM DATE MODIFIED: 7/25/2022 6:15 AM 24. When the heating degree day method was developed, fuel was_____ and buildings were_____ insulated. a. expensive, well b. leaded, asbestos c. inexpensive, poorly d. ethanol-based, not ANSWER: c POINTS: 1 REFERENCES: 42 QUESTION TYPE: Multiple Choice Copyright Cengage Learning. Powered by Cognero.

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Chapter 02: Space Heating and Domestic Water-Heating Loads HAS VARIABLES: False DATE CREATED: 7/25/2022 6:16 AM DATE MODIFIED: 7/27/2022 5:24 AM 25. The R-value of a material is_____ dependent on the material’s temperature. a. not b. greatly c. interdependent d. slightly ANSWER: d POINTS: 1 REFERENCES: 23 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 6:17 AM DATE MODIFIED: 7/25/2022 6:18 AM 26. Since the walls, floors, and ceilings of buildings are rarely constructed of a single material, It is often necessary to determine the______ of an assembly made up of several materials in contact with each other. a. total R-value b. total U-value c. thickness d. density ANSWER: a POINTS: 1 REFERENCES: 23 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 6:18 AM DATE MODIFIED: 7/25/2022 6:19 AM 27. In addition to the thermal resistances of the solid materials, there are two thermal resistances, called the___ film resistance and____ film resistance. a. red, green b. inside air, outside air c. solid, liquid d. hot, cold ANSWER: b POINTS: 1 REFERENCES: 24 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 6:19 AM Copyright Cengage Learning. Powered by Cognero.

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Chapter 02: Space Heating and Domestic Water-Heating Loads DATE MODIFIED: 7/25/2022 6:20 AM 28. The contour lines with temperatures labeled in ºC are called_____. a. thermal barriers b. elevation lines c. degree heating contours d. isotherms ANSWER: d POINTS: 1 REFERENCES: 26 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 6:20 AM DATE MODIFIED: 7/25/2022 6:21 AM 29. One method of approximating the heat loss through basement walls is based on dividing wall into___ strips based on the height of finish grade. a. elevation b. masonry c. vertical d. horizontal ANSWER: d POINTS: 1 REFERENCES: 27 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 6:22 AM DATE MODIFIED: 7/25/2022 6:22 AM 30. The gallons of hot water supplied as the first-hour rating are based on a ___ ºF temperature rise between the incoming cold water and the leaving hot water. a. 90 b. 75 c. 45 d. 60 ANSWER: a POINTS: 1 REFERENCES: 48 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 6:23 AM DATE MODIFIED: 7/25/2022 6:23 AM Copyright Cengage Learning. Powered by Cognero.

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Chapter 03: Hydronic Heat Sources 1. Conventional gas- and oil-fired boilers are currently used in the vast majority of residential and light commercial hydronic systems in North America. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 53 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 6:24 AM DATE MODIFIED: 7/25/2022 6:25 AM 2. The cast-iron sectional boiler is currently one of the most common boilers used in residential and light commercial buildings in North America. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 54 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 6:25 AM DATE MODIFIED: 7/25/2022 6:25 AM 3. If a cast-iron boiler is significantly oversized and experiences long off-times between firing cycles, much of the heat stored in the boiler’s thermal mass can be carried up the flue by air currents passing through the combustion chamber. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 55 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 6:26 AM DATE MODIFIED: 7/25/2022 6:26 AM 4. Many boilers currently used in North America were designed with the intent that flue gases would condense within the boiler. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 59 QUESTION TYPE: True / False Copyright Cengage Learning. Powered by Cognero.

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Chapter 03: Hydronic Heat Sources HAS VARIABLES: False DATE CREATED: 7/25/2022 6:27 AM DATE MODIFIED: 7/25/2022 6:27 AM 5. Condensing boilers are designed with large heat exchanger surfaces capable of extracting more heat from the exhaust gases compared to the heat exchangers in conventional boilers. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 62 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 6:27 AM DATE MODIFIED: 7/25/2022 6:28 AM 6. In full storage ETS systems, all energy used during the subsequent on-peak period is purchased and stored during the peak cycle. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 91 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 6:28 AM DATE MODIFIED: 7/25/2022 6:28 AM 7. The term “hydronic heat pump” always refers to a heat pump that delivers heat to a flowing stream of water. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 94 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 6:28 AM DATE MODIFIED: 7/25/2022 6:29 AM 8. Many heat pumps have internal temperature controllers that monitor the inlet water temperature. a. True b. False ANSWER: True Copyright Cengage Learning. Powered by Cognero.

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Chapter 03: Hydronic Heat Sources POINTS: 1 REFERENCES: 101 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 6:29 AM DATE MODIFIED: 7/25/2022 6:29 AM 9. The heating capacity of the heat pump drops rapidly with increasing source water temperature. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 103 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 6:29 AM DATE MODIFIED: 7/25/2022 6:30 AM 10. It is not advisable to maintain water flow through the condenser whenever the heat pump is operating. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 114 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 6:30 AM DATE MODIFIED: 7/25/2022 6:30 AM 11. Most cast-iron sectional boilers are limited to use in ____ hydronic systems. a. “bare-bones” b. closed loop c. packaged d. distributed ANSWER: b POINTS: 1 REFERENCES: 54 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 6:30 AM DATE MODIFIED: 7/25/2022 6:31 AM 12. The combination of metal and water weight gives cast-iron boilers the ability to absorb a significant amount of heat.

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Chapter 03: Hydronic Heat Sources Such boilers are said to have a high ____. a. life cycle b. density c. efficiency factor d. thermal mass ANSWER: d POINTS: 1 REFERENCES: 55 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 6:31 AM DATE MODIFIED: 7/27/2022 5:25 AM 13. One type of boiler design surrounds the combustion chamber with a water-filled heat exchanger. This arrangement is called a ____ boiler. a. wet-base b. condensation c. steam d. domestic ANSWER: a POINTS: 1 REFERENCES: 57 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 6:32 AM DATE MODIFIED: 7/25/2022 6:33 AM 14. Analysis of combustion processes reveals that significant amounts of heat can be recaptured from the exhaust stream if the water vapor it contains can be ____. a. condensed within the boiler b. expelled from the system c. replenished regularly d. minimized ANSWER: a POINTS: 1 REFERENCES: 62 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 6:33 AM DATE MODIFIED: 7/25/2022 6:33 AM 15. Boilers with low thermal mass tend to have ____ cycle efficiencies due to lesser amounts of heat remaining in the boiler following burner shutdown.

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Chapter 03: Hydronic Heat Sources a. lower b. higher c. predictable d. dependable ANSWER: b POINTS: 1 REFERENCES: 78 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 6:34 AM DATE MODIFIED: 7/25/2022 6:35 AM 16. A boiler operates at _____ efficiency only when it is being fired continuously under nonvarying conditions. a. DOE-certified b. measurable c. steady-state d. manufacturer ANSWER: c POINTS: 1 REFERENCES: 75 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 6:35 AM DATE MODIFIED: 7/25/2022 6:35 AM 17. A ____ is a device for converting low-temperature heat into higher temperature heat. a. thermal converter b. radiating unit c. heat pump d. flue gasket ANSWER: c POINTS: 1 REFERENCES: 93 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 6:36 AM DATE MODIFIED: 7/25/2022 6:36 AM 18. When water is used as the source fluid for open loop systems, the heat pump must be configured to prevent freezing of the____. a. storage tank b. water source c. evaporator Copyright Cengage Learning. Powered by Cognero.

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Chapter 03: Hydronic Heat Sources d. closed-loop ANSWER: c POINTS: 1 REFERENCES: 101 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 6:36 AM DATE MODIFIED: 7/25/2022 6:37 AM 19. Drain-back combi-systems do not require_____ to properly operate. a. water drains b. DOE certified fixtures c. collector heat exchangers d. antifreeze ANSWER: d POINTS: 1 REFERENCES: 122-123 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 6:37 AM DATE MODIFIED: 7/25/2022 6:38 AM 20. It is vital that the solar collectors and all exposed piping in a drain-back system be pitched a minimum of ____ toward the storage tank to allow complete drainage. a. 1/8 in./ft. b. 1/2 in./ft. c. 1/4 in./ft. d. 1/16 in./ft.

ANSWER: c POINTS: 1 REFERENCES: 123 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 6:38 AM DATE MODIFIED: 7/25/2022 6:39 AM 21. The most widely used hydronic heat pump is configured to extract heat from_________. a. flue gas b. a water source c. a converter d. a piston motor ANSWER: b POINTS: 1 Copyright Cengage Learning. Powered by Cognero.

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Chapter 03: Hydronic Heat Sources REFERENCES: 98 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 6:39 AM DATE MODIFIED: 7/25/2022 6:40 AM 22. A______ absorbs heat from the hot refrigerant gas leaving the compressor and transfers that heat to a stream of domestic water. a. insulating blanket b. solar array c. collector d. desuperheater ANSWER: d POINTS: 1 REFERENCES: 99 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 6:40 AM DATE MODIFIED: 7/25/2022 7:30 AM 23. ___________ are called open-loop sources since, at some location, the water they contain is exposed to the atmosphere. a. Collectors, thermal tanks and valves b. Wells, ponds, or lakes. c. Tubes, drains and collectors d. Oils, mines, and gas fields ANSWER: b POINTS: 1 REFERENCES: 101 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 7:31 AM DATE MODIFIED: 7/25/2022 7:32 AM 24. Most water-to-water heat pumps have minimum____ source water temperatures specified by their manufacturer. a. internal b. steady-state c. outlet d. inlet ANSWER: d POINTS: 1 REFERENCES: 101 QUESTION TYPE: Multiple Choice Copyright Cengage Learning. Powered by Cognero.

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Chapter 03: Hydronic Heat Sources HAS VARIABLES: False DATE CREATED: 7/25/2022 7:32 AM DATE MODIFIED: 7/25/2022 7:33 AM 25. In situations where open-loop water sources are not available or suitable for use, a closed-loop______ can supply lowtemperature heat to a water source heat pump. a. thermal tank b. earth heat exchanger c. outlet d. inlet ANSWER: b POINTS: 1 REFERENCES: 101 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 7:33 AM DATE MODIFIED: 7/25/2022 7:34 AM 26. All solar thermal systems use a_____ to consisting of one or more_________. a. collection array, solar collectors b. pv panel, pv cells c. R-value insulation, panels d. flue damper, natural gas pipes ANSWER: a POINTS: 1 REFERENCES: 116 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 7:34 AM DATE MODIFIED: 7/25/2022 7:34 AM 27. The heart of the flat plat collector is its______. a. collection array b. absorber plate c. circuit panel d. solar tile ANSWER: b POINTS: 1 REFERENCES: 116 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 7:36 AM DATE MODIFIED: 7/25/2022 7:37 AM Copyright Cengage Learning. Powered by Cognero.

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Chapter 03: Hydronic Heat Sources 28. Most older wood stoves and cordwood boilers are____________. a. installed in the attic area only b. made with brass jackets c. gasoline motors d. single stage combustion ANSWER: d POINTS: 1 REFERENCES: 126 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 7:37 AM DATE MODIFIED: 7/25/2022 7:38 AM 29. Modern two-stage cordwood gasification boilers can achieve thermal efficiencies in the range of ___. a. 10-25 b. 90% c. 70-80% d. 40-50% ANSWER: c POINTS: 1 REFERENCES: 127 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 7:38 AM DATE MODIFIED: 7/25/2022 7:39 AM 30. When a pellet boiler is the sole heat in a system it is typically sized to the building’s_____. a. thermal envelope b. design heating load c. R-value insulation d. square footage ANSWER: b POINTS: 1 REFERENCES: 133 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 7:39 AM DATE MODIFIED: 7/25/2022 7:41 AM

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Chapter 04: Properties of Water 1. One of the most important properties of water relevant to its use in hydronic systems is specific heat. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 140 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 5:25 AM DATE MODIFIED: 7/25/2022 5:26 AM 2. If the material changes phase while absorbing heat, its temperature will change. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 140 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 5:27 AM DATE MODIFIED: 7/25/2022 5:28 AM 3. The specific heat of water is high in comparison to other common materials. In fact, water has one of the highest specific heats of any known material. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 140 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 5:29 AM DATE MODIFIED: 7/25/2022 5:29 AM 4. The difference in heat capacity of water versus that of air is the single greatest advantage of using water rather than air to convey heat. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 141 QUESTION TYPE: True / False HAS VARIABLES: False Copyright Cengage Learning. Powered by Cognero.

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Chapter 04: Properties of Water DATE CREATED: 7/25/2022 5:30 AM DATE MODIFIED: 7/25/2022 5:31 AM 5. The density of water is dependent on temperature. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 141 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 5:31 AM DATE MODIFIED: 7/25/2022 5:32 AM 6. It is often necessary to determine the quantity of heat stored in a given amount of material that undergoes a specific temperature change. An equation known as the sensible heat quantity equation can be used for this purpose. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 142 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 5:33 AM DATE MODIFIED: 7/25/2022 5:34 AM 7. The quantity of heat absorbed or released from the material is expressed as Btu/hr. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 142 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 5:34 AM DATE MODIFIED: 7/25/2022 5:36 AM 8. The rate of heat transfer into or out of the fluid stream in equations is expressed as Btu. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 144 Copyright Cengage Learning. Powered by Cognero.

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Chapter 04: Properties of Water QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 5:37 AM DATE MODIFIED: 7/25/2022 5:38 AM 9. The vapor pressure of a liquid is the minimum pressure that must be applied at the liquid’s surface to prevent it from boiling. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 145 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 5:38 AM DATE MODIFIED: 7/25/2022 5:39 AM 10. When hydronic systems are first filled with water, dissolved air is present in the water throughout the system. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 147 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 5:39 AM DATE MODIFIED: 7/25/2022 5:40 AM 11. The heat absorbed or released by a material while it remains in a single phase is called ____ heat. a. radiant b. latent c. ambient d. sensible ANSWER: d POINTS: 1 REFERENCES: 140 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 5:40 AM DATE MODIFIED: 7/25/2022 5:42 AM 12. If the material changes phase while absorbing heat, its temperature does not change. The heat absorbed in such a process is called ____ heat.

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Chapter 04: Properties of Water a. radiant b. sensible c. ambient d. latent ANSWER: d POINTS: 1 REFERENCES: 140 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 5:42 AM DATE MODIFIED: 7/25/2022 5:44 AM 13. Although it is not a defined scientific term, it could be said that water is almost ____ times more “thermally concentrated” than air. a. 3 b. 35 c. 3,500 d. 350 ANSWER: c POINTS: 1 REFERENCES: 141 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 5:44 AM DATE MODIFIED: 7/25/2022 5:45 AM 14. Hydronic system designers often need to know the ____ of heat transfer to or from a stream of water flowing through a device such as a heat source or heat emitter. a. temperature b. rate c. thermal mass d. exact volume ANSWER: b POINTS: 1 REFERENCES: 143 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 5:45 AM DATE MODIFIED: 7/25/2022 5:47 AM 15. The ____ pressure of a liquid is the minimum pressure that must be applied at the liquid’s surface to prevent it from boiling. a. surface Copyright Cengage Learning. Powered by Cognero.

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Chapter 04: Properties of Water b. mean c. vapor d. systemic ANSWER: c POINTS: 1 REFERENCES: 145 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 5:47 AM DATE MODIFIED: 7/25/2022 5:48 AM 16. The viscosity of a fluid is an indicator of its resistance to ____. a. flow b. heat c. combining d. displacement ANSWER: a POINTS: 1 REFERENCES: 146 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 5:49 AM DATE MODIFIED: 7/25/2022 5:51 AM 17. The amount of air that can exist in solution with water is strongly dependent on the water’s temperature. As water is heated, its ability to hold air in solution ____. a. rapidly increases b. rapidly decreases c. is viscosity dependent d. remains constant ANSWER: b POINTS: 1 REFERENCES: 147 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 5:52 AM DATE MODIFIED: 7/25/2022 5:55 AM 18. When a quantity of liquid water is put under pressure, there is ____ change in its volume. a. a significant b. very little c. a corresponding d. a formulaic Copyright Cengage Learning. Powered by Cognero.

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Chapter 04: Properties of Water ANSWER: b POINTS: 1 REFERENCES: 148 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 5:56 AM DATE MODIFIED: 7/25/2022 5:57 AM 19. The total liquid flow rate entering any portion of a fluid-filled (nonleaking) piping assembly will ____ the total flow rate exiting that assembly. a. always equal b. never equal c. might equal d. approximate ANSWER: a POINTS: 1 REFERENCES: 149 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 5:58 AM DATE MODIFIED: 7/25/2022 5:59 AM 20. Incompressibility implies that liquids can exert tremendous pressure in any type of filled and closed container when they ____ due to heating. a. contract b. dissolve c. expand d. vaporize ANSWER: c POINTS: 1 REFERENCES: 149 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 5:59 AM DATE MODIFIED: 7/25/2022 6:01 AM 21. When water changes from a liquid to a vapor, it must adsorb approximately____ while the temperature remains constant. a. 970 Btu/lb b. 1,200 Btu/lb c. 50 Btu/lb d. 970 Btu/kg ANSWER: a Copyright Cengage Learning. Powered by Cognero.

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Chapter 04: Properties of Water POINTS: 1 REFERENCES: 140 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 6:02 AM DATE MODIFIED: 7/25/2022 6:03 AM 22. The heat capacity of a material is the number of Btus required to____ the temperature of one cubic foot of the material 1 ºF. a. lower b. change c. raise d. convert ANSWER: c POINTS: 1 REFERENCES: 140 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 6:06 AM DATE MODIFIED: 7/25/2022 6:08 AM 23. In this text, the density of a material refers to the number of ____ of the material needed to fill a volume of one cubic foot. a. ounces b. pounds c. jewels d. meters ANSWER: b POINTS: 1 REFERENCES: 141 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 6:08 AM DATE MODIFIED: 7/25/2022 6:12 AM 24. One gallon of water weighs approximately_______. a. 16 ounces b. 24 pounds c. 8.33 pounds d. 17 gpm ANSWER: c POINTS: 1 REFERENCES: 142 Copyright Cengage Learning. Powered by Cognero.

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Chapter 04: Properties of Water QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 6:12 AM DATE MODIFIED: 7/25/2022 6:14 AM 25. Vapor pressure is stated as a(n)____ pressure and has the units of psia. a. barometric b. absolute c. expanded d. sensible ANSWER: b POINTS: 1 REFERENCES: 145 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 6:14 AM DATE MODIFIED: 7/25/2022 6:16 AM 26. The viscosity of a fluid is an indicator of its resistance to____. a. heat b. electrolysis c. conductivity d. flow ANSWER: d POINTS: 1 REFERENCES: 146 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 6:16 AM DATE MODIFIED: 7/25/2022 6:18 AM 27. Solutions of water and glycol-based______ have significantly higher viscosities than water alone. a. oil b. antifreeze c. nitrogen d. sodium solution ANSWER: b POINTS: 1 REFERENCES: 147 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 6:18 AM DATE MODIFIED: 7/25/2022 6:19 AM Copyright Cengage Learning. Powered by Cognero.

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Chapter 04: Properties of Water 28. For the purposes of hydronic system design, we can treat water, and most other liquids, as being____. a. dirty b. oily c. compressible d. incompressible ANSWER: d POINTS: 1 REFERENCES: 148 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 6:20 AM DATE MODIFIED: 7/25/2022 6:22 AM 29. _____ involves removing undesirable minerals such as the dissolved calcium and magnesium compounds found in most ground water and municipal water systems. a. Demineralization b. Filtering c. Reclaiming d. Recycling ANSWER: a POINTS: 1 REFERENCES: 150 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 6:22 AM DATE MODIFIED: 7/25/2022 6:26 AM 30. Water with____ conductivity will also prevent proper operation of low-water cutoff devices, such as those required by code in many hydronic systems. a. 17% b. zero c. 28% d. 40-70% ANSWER: b POINTS: 1 REFERENCES: 151 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 6:27 AM DATE MODIFIED: 7/25/2022 6:29 AM

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Chapter 05: Pipings, Fittings, and Valves 1. Hydronic heating systems should never use a combination of flexible and rigid piping materials. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 158 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 6:31 AM DATE MODIFIED: 7/25/2022 6:32 AM 2. In the absence of any building or mechanical codes that require otherwise, type M is the standard for copper tubing used in hydronic heating systems. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 159 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 6:32 AM DATE MODIFIED: 7/25/2022 6:33 AM 3. Plumbing codes allow solders containing lead to be used for domestic water service. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 162 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 6:33 AM DATE MODIFIED: 7/25/2022 6:35 AM 4. ASTM F876 standard for PEX tubing establishes three simultaneous temperature/pressure ratings based on operation with water. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 168 QUESTION TYPE: True / False HAS VARIABLES: False Copyright Cengage Learning. Powered by Cognero.

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Chapter 05: Pipings, Fittings, and Valves DATE CREATED: 7/25/2022 6:35 AM DATE MODIFIED: 7/25/2022 6:36 AM 5. Some press fittings used in residential and light commercial buildings are rated to operate at pressures up to 200 psi and temperatures ranging from 0 to 250 ºF. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 167 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 6:37 AM DATE MODIFIED: 7/25/2022 6:37 AM 6. A well-planned piping assembly will use the largest number of fittings possible. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 178 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 6:38 AM DATE MODIFIED: 7/25/2022 7:22 AM 7. Due to thermal expansion, the greater the length of the pipe, and the greater the temperature change, the greater the change in length. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 182 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 7:25 AM DATE MODIFIED: 7/25/2022 7:26 AM 8. A feed water valve is used to increase the pressure of water from a domestic water distribution pipe before it enters a hydronic system. a. True b. False ANSWER: False POINTS: 1 Copyright Cengage Learning. Powered by Cognero.

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Chapter 05: Pipings, Fittings, and Valves REFERENCES: 189 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 7:26 AM DATE MODIFIED: 7/25/2022 7:27 AM 9. Piping schematics are the road maps of hydronic system design. Unfortunately, there is no universal standard for piping symbols to which all those in the hydronics industry subscribes. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 213 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 7:27 AM DATE MODIFIED: 7/25/2022 7:27 AM 10. In situations where both piping and electrical wiring are in close proximity, try to keep the piping above the electrical wiring. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 214, 215 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 7:28 AM DATE MODIFIED: 7/25/2022 7:28 AM 11. In situations where good heat transfer through the walls of the pipe is desirable, ____ is unsurpassed. a. stainless steel b. PEX c. cross-linked polyethylene d. copper ANSWER: d POINTS: 1 REFERENCES: 158 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 7:29 AM DATE MODIFIED: 7/25/2022 7:30 AM Copyright Cengage Learning. Powered by Cognero.

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Chapter 05: Pipings, Fittings, and Valves 12. Copper water tube is available in three wall thicknesses designated as types ____ in order of decreasing wall thickness. a. A, B, and C b. S, M, and L c. K, L, and M d. 1,2, and 3 ANSWER: c POINTS: 1 REFERENCES: 159 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 7:30 AM DATE MODIFIED: 7/25/2022 7:31 AM 13. Copper tubing must be properly supported to prevent sagging or buckling. On horizontal runs of hard temper tubing, the maximum support spacing for 1/2- and 3/4-inch tube is ____ feet. a. 2 b. 5 c. 4 d. 6 ANSWER: b POINTS: 1 REFERENCES: 159 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 7:32 AM DATE MODIFIED: 7/25/2022 7:33 AM 14. In situations where several runs of piping and/or electrical conduit must be run in close proximity, a ____ system is a good option. a. clevis hanger b. rubber liner c. mounting rail d. vertical piping ANSWER: c POINTS: 1 REFERENCES: 160 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 7:33 AM DATE MODIFIED: 7/25/2022 7:34 AM 15. Fittings for copper tubing are available in either wrought copper or ____.

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Chapter 05: Pipings, Fittings, and Valves a. stainless steel b. cast brass c. tempered rubber d. PEX ANSWER: b POINTS: 1 REFERENCES: 176 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 7:34 AM DATE MODIFIED: 7/25/2022 7:36 AM 16. When long straight runs of rigid tubing are required, it may be necessary to install an expansion loop or an expansion offset to absorb the movement. Another alternative is to install an expansion ____ capable of absorbing the movement. a. compensator b. flex joint c. barometer d. overflow ANSWER: a POINTS: 1 REFERENCES: 183 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 7:36 AM DATE MODIFIED: 7/25/2022 7:37 AM 17. Feed water valves operate by balancing the force generated by water pressure against an internal flexible ____, with the counterforce generated by a partially compressed spring. a. feeder b. diaphragm c. valve body d. pressurizer ANSWER: b POINTS: 1 REFERENCES: 189 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 7:37 AM DATE MODIFIED: 7/25/2022 7:38 AM 18. Hydronic heating systems, once assembled, must be purged of air and filled with fluid. A(n) ____ is specifically designed for this purpose. a. purging valve Copyright Cengage Learning. Powered by Cognero.

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Chapter 05: Pipings, Fittings, and Valves b. air deactivator valve c. ball valve assembly d. purging valve ANSWER: a POINTS: 1 REFERENCES: 191 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 7:38 AM DATE MODIFIED: 7/25/2022 7:39 AM 19. If the inlet pressure on the backflow preventer drops below the pressure in the hydronic system, springs return both check valves and the movable cartridge to their ____ positions. a. original b. closed c. rest d. preset ANSWER: a POINTS: 1 REFERENCES: 192 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 7:40 AM DATE MODIFIED: 7/25/2022 7:41 AM 20. Another specialty valve widely used in hydronic systems provides the ability to isolate, flow balance, and even drain individual heat emitters. It is called a ____. a. zone valve b. balancing valve c. differential pressure bypass valve d. lockshield valve ANSWER: d POINTS: 1 REFERENCES: 212 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 7:41 AM DATE MODIFIED: 7/25/2022 7:43 AM 21. Unlike PEX tubing, PEX-AL-PEX tubing cannot be repaired by heating the tub until the PEX reaches its____ state. a. amorphous b. steady c. solid Copyright Cengage Learning. Powered by Cognero.

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Chapter 05: Pipings, Fittings, and Valves d. liquid ANSWER: a POINTS: 1 REFERENCES: 170 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 7:43 AM DATE MODIFIED: 7/25/2022 7:44 AM 22. ____ tubing consists of high-density polyethylene that has undergone molecule modification that creates sufficient tie chains between the polyethene molecules to allow it to operate at higher temperatures. a. PE-RT b. PEX c. PP-R d. Polymer ANSWER: a POINTS: 1 REFERENCES: 172 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 7:44 AM DATE MODIFIED: 7/25/2022 7:45 AM 23. ________ are used to secure piping to either walls or ceilings. a. Mechanical piping supports b. Vertical piping supports c. Rubber piping supports d. Standoff piping supports ANSWER: d POINTS: 1 REFERENCES: 160 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 7:46 AM DATE MODIFIED: 7/25/2022 7:47 AM 24. When soldering copper tubing be sure the tube cut is square. Use a(n) _______ with a blade suitable for the copper tubing. a. wheel cutter or chop saw b. hacksaw c. electric saw d. wood saw ANSWER: a Copyright Cengage Learning. Powered by Cognero.

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Chapter 05: Pipings, Fittings, and Valves POINTS: 1 REFERENCES: 162 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 7:47 AM DATE MODIFIED: 7/25/2022 7:49 AM 25. The driving force of________ is a lower concentration of dissolved oxygen molecules within the water inside the tube, compared to the concentration outside the tube. a. nitrogen diffusion b. oxygen diffusion c. hydrogen diffusion d. oxygen formation ANSWER: b POINTS: 1 REFERENCES: 174 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 7:49 AM DATE MODIFIED: 7/25/2022 7:50 AM 26. Some common pipe fittings in hydronic systems include___________. a. couplings, elbows, and tees b. transformers and circuits c. LEDs and outlets d. pipe benders ANSWER: a POINTS: 1 REFERENCES: 176 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 7:50 AM DATE MODIFIED: 7/25/2022 7:52 AM 27. A(n)_____ is commonly used to mount an air vent at high points in piping circuits. a. elbow tee. b. baseboard tee c. reducing tee d. diverter tee ANSWER: b POINTS: 1 REFERENCES: 179 QUESTION TYPE: Multiple Choice Copyright Cengage Learning. Powered by Cognero.

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Chapter 05: Pipings, Fittings, and Valves HAS VARIABLES: False DATE CREATED: 7/25/2022 7:52 AM DATE MODIFIED: 7/25/2022 7:54 AM 28. The smaller the coefficient of linear expansion, the_____ tubing expands for a given change in temperature. a. less the b. more the c. modulating d. copper ANSWER: a POINTS: 1 REFERENCES: 182 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 7:54 AM DATE MODIFIED: 7/25/2022 7:56 AM 29. ______ are designed specifically for component isolation. a. Globe valves b. Gate valves c. Angle valves d. Ball valves ANSWER: b POINTS: 1 REFERENCES: 185 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 7:56 AM DATE MODIFIED: 7/25/2022 7:57 AM 30. A device used to allow or prevent flow through a zone circuit is called a(n)_____. a. zone diverter b. actuator valve c. zone modulator d. zone valve ANSWER: d POINTS: 1 REFERENCES: 204 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 7:57 AM DATE MODIFIED: 7/25/2022 7:59 AM Copyright Cengage Learning. Powered by Cognero.

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Chapter 05: Pipings, Fittings, and Valves 31. There is___ universal standard for piping symbols to which all those in the industry subscribe. a. a rigid b. a code-enforced c. no d. one ANSWER: a POINTS: 1 REFERENCES: 213 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 7:59 AM DATE MODIFIED: 7/25/2022 8:00 AM

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Chapter 06: Fluid Flow in Piping 1. In a purely technical sense, the word fluid can mean either a liquid, such as water, or a gas, such as air. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 222 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 8:16 AM DATE MODIFIED: 7/25/2022 8:17 AM 2. Flow velocity is a measurement of the volume of fluid that passes a given location in a pipe in a given time. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 222 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 8:17 AM DATE MODIFIED: 7/25/2022 8:18 AM 3. The static pressure at a given depth below the surface of a liquid changes based on the diameter of the pipe. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 224, 225 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 8:18 AM DATE MODIFIED: 7/25/2022 8:19 AM 4. Using pressure gauges to detect changes in the head of a liquid is like using thermometers to detect changes in the thermal energy content of that liquid. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 228 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 8:20 AM Copyright Cengage Learning. Powered by Cognero.

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Chapter 06: Fluid Flow in Piping DATE MODIFIED: 7/25/2022 8:21 AM 5. Each component in a piping assembly or circuit has an associated hydraulic resistance that defines its ability to dissipate head from the fluid at any given flow rate. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 231 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 8:21 AM DATE MODIFIED: 7/25/2022 8:22 AM 6. Use of pressure drop charts based on 60° F water will consistently underestimate the pressure drop in hydronic piping circuits because the water will usually be at higher temperatures. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 236 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 8:22 AM DATE MODIFIED: 7/25/2022 8:23 AM 7. The equivalent length of a component is the amount of tubing, of the same pipe size, that would produce the same head loss (or pressure drop), as the actual component, at the same flow rate. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 236 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 8:23 AM DATE MODIFIED: 7/25/2022 8:24 AM 8. All piping circuits have a unique system head loss curve. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 239 Copyright Cengage Learning. Powered by Cognero.

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Chapter 06: Fluid Flow in Piping QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 8:24 AM DATE MODIFIED: 7/25/2022 8:25 AM 9. The analogy of hydraulic resistance and electrical resistance does not apply to how complex resistor diagrams can be reduced to simpler equivalent diagrams. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 240 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 8:25 AM DATE MODIFIED: 7/25/2022 8:26 AM 10. Every piping system should be thought of as having an operating cost as well as an installation cost. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 251 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 7/25/2022 8:26 AM DATE MODIFIED: 7/25/2022 8:27 AM 11. The term “flow velocity” is commonly understood to mean the ____ flow velocity of the fluid as it moves through a pipe. a. pressurized b. maximum c. average d. minimum ANSWER: c POINTS: 1 REFERENCES: 222 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 8:30 AM DATE MODIFIED: 7/25/2022 8:32 AM 12. A pipe size should be selected that keeps the average flow velocity between ____ ft./sec.

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Chapter 06: Fluid Flow in Piping a. .5 and .75 b. 1 and 2 c. 1 and 3 d. 2 and 4 ANSWER: d POINTS: 1 REFERENCES: 223 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 8:33 AM DATE MODIFIED: 7/25/2022 8:39 AM 13. Fluids in a hydronic system contain both thermal and mechanical energy. The mechanical energy, or ____, present in a fluid depends on several factors including its pressure, density, elevation, and velocity at some point in the system. a. head b. compression c. static d. pressure ANSWER: a POINTS: 1 REFERENCES: 226 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 8:44 AM DATE MODIFIED: 7/25/2022 8:46 AM 14. Whenever a fluid flows, an energy dissipating effect called ____ develops both within the fluid stream and along any surfaces the fluid contacts. a. viscous friction b. thermal reduction c. anti-flow d. pressure inhibition ANSWER: a POINTS: 1 REFERENCES: 229 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 8:51 AM DATE MODIFIED: 7/25/2022 8:55 AM 15. After the hydraulic resistances of all devices in a piping assembly are determined, they can be combined into a(n) ____ resistance similar to how electrical resistances are combined in circuit analysis. a. system Copyright Cengage Learning. Powered by Cognero.

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Chapter 06: Fluid Flow in Piping b. equivalent c. calculated d. average ANSWER: b POINTS: 1 REFERENCES: 233 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 8:59 AM DATE MODIFIED: 7/25/2022 9:02 AM 16. ____ represents the relationship between flow rate and head loss for a given piping circuit using a specific fluid at a given temperature. a. System heat loss coordination b. System head loss curve c. System flow equation d. System flow/loss calculation ANSWER: b POINTS: 1 REFERENCES: 239 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 12:00 PM DATE MODIFIED: 7/25/2022 12:01 PM 17. Copper tubing is also subject to a condition called ____, which can literally scrub metal off the inside wall of a tube or fittings. a. thermal rusting b. frictional pressure c. flow rasping d. erosion corrosion ANSWER: d POINTS: 1 REFERENCES: 250 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 12:01 PM DATE MODIFIED: 7/25/2022 12:03 PM 18. The simplest piping assemblies are formed by connecting piping components end to end. In some cases, the collection of tubing, fittings, valves, and other components closes on itself to form a ____. a. multi-resistor system b. radiant loop Copyright Cengage Learning. Powered by Cognero.

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Chapter 06: Fluid Flow in Piping c. series circuit d. thermal compound ANSWER: c POINTS: 1 REFERENCES: 240 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 12:03 PM DATE MODIFIED: 7/25/2022 12:04 PM 19. A more efficient method can be used in the common situation where the piping circuit contains a(n) ____ of pipe, fittings, and valves. a. single size b. multi-size c. industry standard amount d. user maintainable ANSWER: a POINTS: 1 REFERENCES: 241 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 12:04 PM DATE MODIFIED: 7/25/2022 12:05 PM 20. The piping paths that share common points of connection are said to be piped ____. a. in series b. in parallel c. equivalently d. co-operatively ANSWER: b POINTS: 1 REFERENCES: 244 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 12:05 PM DATE MODIFIED: 7/25/2022 12:09 PM 21. If a gallon of water was pushed into one end of pipe, ____ amount would flow out of the other end. a. the exact same b. a different c. a warmer d. a colder ANSWER: b Copyright Cengage Learning. Powered by Cognero.

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Chapter 06: Fluid Flow in Piping POINTS: 1 REFERENCES: 222 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 12:09 PM DATE MODIFIED: 7/25/2022 12:10 PM 22. The word static means the fluid____ moving. a. is b. is quickly c. is slowly d. is not ANSWER: d POINTS: 1 REFERENCES: 224 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 12:15 PM DATE MODIFIED: 7/25/2022 12:17 PM 23. ______ is the mechanical energy a fluid contains because of its velocity. a. Total head b. Elevation head c. Velocity head d. Pressure head ANSWER: c POINTS: 1 REFERENCES: 227 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 12:18 PM DATE MODIFIED: 7/25/2022 12:19 PM 24. Most hydronic heating systems consist of________. a. closed piping systems b. open piping systems c. copper piping systems d. plastic piping systems ANSWER: a POINTS: 1 REFERENCES: 229 QUESTION TYPE: Multiple Choice HAS VARIABLES: False Copyright Cengage Learning. Powered by Cognero.

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Chapter 06: Fluid Flow in Piping DATE CREATED: 7/25/2022 12:20 PM DATE MODIFIED: 7/25/2022 12:21 PM 25. Laminar flow creates______ amounts of heat loss. a. heavy b. minimal c. large d. turbulent ANSWER: b POINTS: 1 REFERENCES: 230 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 12:22 PM DATE MODIFIED: 7/25/2022 12:23 PM 26. ______ is a calculation used to predict if the flow within a pipe will be laminar or turbulent. a. The heat loss equation b. The Reynolds number c. The hydraulic equation d. The piping circuit law ANSWER: b POINTS: 1 REFERENCES: 231 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 12:24 PM DATE MODIFIED: 7/25/2022 12:26 PM 27. The α value is a complete mathematical description of the fluid’s physical properties for the purposes of determining____________. a. heat losses b. pressure losses c. the pipe size coefficient d. hydraulic resistance ANSWER: d POINTS: 1 REFERENCES: 234 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 12:26 PM DATE MODIFIED: 7/25/2022 12:29 PM Copyright Cengage Learning. Powered by Cognero.

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Chapter 06: Fluid Flow in Piping 28. The piping paths that share common points of connection are said to.be ________. a. metal fatigue b. piped in parallel c. The hydraulic equation d. The piping circuit law ANSWER: b POINTS: 1 REFERENCES: 244 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 12:30 PM DATE MODIFIED: 7/25/2022 12:31 PM 29. The concept of using series and parallel_____ to represent piping assemblies is a powerful tool when properly applied. a. resistors b. circuits c. branches d. valves ANSWER: a POINTS: 1 REFERENCES: 247 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 12:32 PM DATE MODIFIED: 7/25/2022 12:33 PM 30. A condition called___________ can literally scrub metal off the inside wall of a tube or fitting. a. heat stress b. oxidating c. metal fatigue d. erosion corrosion ANSWER: d POINTS: 1 REFERENCES: 250 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 7/25/2022 12:34 PM DATE MODIFIED: 7/25/2022 12:35 PM

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Chapter 07: Hydronic Circulators 1. Within the hydronics industry, the terms pump and circulator are used interchangeably. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 258 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 3:48 AM DATE MODIFIED: 8/8/2022 3:52 AM 2. The fluid’s mechanical energy content is increased as it is accelerated toward the inner edge of the impeller. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 258 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 3:52 AM DATE MODIFIED: 8/8/2022 3:53 AM 3. The motor of a wet rotor circulator is totally cooled and lubricated by the system’s fluid. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 259 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 3:53 AM DATE MODIFIED: 8/8/2022 3:53 AM 4. Most circulators used in smaller hydronic systems are designed to be installed with their shafts in a horizontal position. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 261 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 3:53 AM DATE MODIFIED: 8/8/2022 3:54 AM Copyright Cengage Learning. Powered by Cognero.

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Chapter 07: Hydronic Circulators 5. Always install the circulator so that its inlet is close to the connection point of the system’s expansion tank. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 263 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 3:54 AM DATE MODIFIED: 8/8/2022 3:55 AM 6. The rate at which a circulator adds head to the fluid in a piping system equals the rate at which the piping system dissipates this head, and this system is said to be in hydraulic equilibrium. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 270 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 3:55 AM DATE MODIFIED: 8/8/2022 3:56 AM 7. Circulators with “flat” pump curves should be used when the objective is to maintain a relatively turbulent pressure differential across the distribution system over a wide range of flow rates. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 271 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 3:56 AM DATE MODIFIED: 8/8/2022 3:57 AM 8. When two identical circulators are connected in series, the resulting pump curve can be found by doubling the head produced by a single circulator at each flow rate. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 272 QUESTION TYPE: True / False Copyright Cengage Learning. Powered by Cognero.

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Chapter 07: Hydronic Circulators HAS VARIABLES: False DATE CREATED: 8/8/2022 3:57 AM DATE MODIFIED: 8/8/2022 3:58 AM 9. The pump curve for two identical circulators connected in parallel is obtained by doubling the flow rate of a single circulator at each head value. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 273 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 3:58 AM DATE MODIFIED: 8/8/2022 3:58 AM 10. For a liquid at a given temperature, cavitation occurs anywhere the liquid’s pressure drops below its vapor pressure. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 292 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 3:59 AM DATE MODIFIED: 8/8/2022 3:59 AM 11. The circulators used in hydronic systems are technically classified as ____ pumps. a. pressurized b. centrifugal c. nominal d. rotational ANSWER: b POINTS: 1 REFERENCES: 258 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 5:56 AM DATE MODIFIED: 8/8/2022 5:57 AM 12. The circulator must first be filled with water and purged of most air before it can operate properly. This is called ____. a. priming b. compressing Copyright Cengage Learning. Powered by Cognero.

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Chapter 07: Hydronic Circulators c. purging d. volumizing ANSWER: a POINTS: 1 REFERENCES: 258 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 5:57 AM DATE MODIFIED: 8/8/2022 5:59 AM 13. The most common method of connecting a circulator to piping is with bolted flanges. A special type of flange, known as an isolation flange, contains a built-in ____. a. water pump b. thermometer c. impeller d. ball valve ANSWER: d POINTS: 1 REFERENCES: 262 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 5:59 AM DATE MODIFIED: 8/8/2022 6:01 AM 14. An increase in pressure from the inlet to outlet port of an operating circulator is the “evidence” that ____ has been added to the fluid. a. more volume b. thermal dynamics c. antifreeze d. head energy ANSWER: d POINTS: 1 REFERENCES: 267 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:01 AM DATE MODIFIED: 8/8/2022 6:02 AM 15. When the rate at which a circulator adds head to the fluid in a piping system equals the rate at which the piping system dissipates this head, the system is in hydraulic equilibrium, and flow rate will ____. a. remain constant b. steadily increase c. occasionally decrease Copyright Cengage Learning. Powered by Cognero.

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Chapter 07: Hydronic Circulators d. fluctuate only slightly ANSWER: a POINTS: 1 REFERENCES: 270 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:02 AM DATE MODIFIED: 8/8/2022 6:06 AM 16. To reduce the number of circulator models needed and still cover a wide range of performance requirements, most circulator manufacturers now offer wet rotor circulators capable of operating at ____ different speeds. a. four b. three c. five d. many ANSWER: b POINTS: 1 REFERENCES: 272 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:07 AM DATE MODIFIED: 8/8/2022 6:09 AM 17. For a liquid at a given temperature, cavitation occurs anywhere the liquid’s pressure ____ its vapor pressure. a. exceeds b. is in equilibrium with c. is compressed by d. drops below ANSWER: d POINTS: 1 REFERENCES: 292 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:09 AM DATE MODIFIED: 8/8/2022 6:10 AM 18. The net positive suction head available (NPSHA) is a precise description of the state of the fluid, within a specific piping system, as it enters the circulator. It includes the effects of temperature, pressure, velocity, and the fluid’s ____ into a single number. a. vapor equilibrium b. flow c. hydraulic equilibrium d. vapor pressure Copyright Cengage Learning. Powered by Cognero.

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Chapter 07: Hydronic Circulators ANSWER: d POINTS: 1 REFERENCES: 265 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:10 AM DATE MODIFIED: 8/8/2022 6:12 AM 19. When designing a piping system, select a circulator that delivers up to ____ more head than required at the desired flow rate. a. 5% b. 10% c. 25% d. 50% ANSWER: b POINTS: 1 REFERENCES: 302 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:18 AM DATE MODIFIED: 8/8/2022 6:28 AM 20. A flow-check valve, or spring-loaded check valve, needs to be installed in each piping circuit anytime multiple circulators are installed ____. a. in series b. proportionally c. in half unions d. in parallel ANSWER: d POINTS: 1 REFERENCES: 270 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:29 AM DATE MODIFIED: 8/8/2022 6:30 AM 21. The circulator must first be filled with water and purged of most air before it can operate properly. This is called_______. a. priming b. cleaning c. fueling d. pumping ANSWER: a Copyright Cengage Learning. Powered by Cognero.

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Chapter 07: Hydronic Circulators POINTS: 1 REFERENCES: 258 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:43 AM DATE MODIFIED: 8/8/2022 6:44 AM 22. "One of the Hydraulic Institute’s" recent undertakings was to develop a__________ that allows for energy use comparisons between circulators that are under consideration for a specific hydronic system application. a. priming method b. purging method c. fueling program d. circulator rating program ANSWER: d POINTS: 1 REFERENCES: 290 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:46 AM DATE MODIFIED: 8/8/2022 6:50 AM 23. The ER (Energy Rating) procedure involves gathering several types of performance data for a circulator, including its_____________, along with electrical input power and hydraulic output power at several flow rates. a. worst efficiency point (WEP) b. best efficiency point (BEP) c. annual efficiency point (AEP) d. circulation efficiency point (CEP) ANSWER: b POINTS: 1 REFERENCES: 290 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:54 AM DATE MODIFIED: 8/8/2022 6:56 AM 24. When vapor pockets form from liquid water, the density inside the vapor pocket is about______ lower than the surrounding liquid. a. 1,500 times b. 900 times c. 1,200 times d. 600 times ANSWER: a POINTS: 1 Copyright Cengage Learning. Powered by Cognero.

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Chapter 07: Hydronic Circulators REFERENCES: 292 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:56 AM DATE MODIFIED: 8/8/2022 6:58 AM 25. The NPSHA indicates the difference between the_______ of the fluid at the inlet port of the circulator and the head at which the fluid will boil. a. total force b. total head c. total energy d. total movement ANSWER: b POINTS: 1 REFERENCES: 293 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:58 AM DATE MODIFIED: 8/8/2022 6:59 AM 26. Every circulator has a minimum required value of net positive suction head in order to operate without cavitation. This value is called the__________________. a. Net Absolute Suction Head Required b. Net Energy Suction Head Required c. Net Negative Suction Head Required d. Net Positive Suction Head Required ANSWER: d POINTS: 1 REFERENCES: 294 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:59 AM DATE MODIFIED: 8/8/2022 7:00 AM 27. If the system experiencing cavitation is operating at a relatively high water temperature (above 190 °F), try lowering the boiler aqua stat setting by about_____. a. 20 °F b. 10 °F c. 15 °F d. 30 °F ANSWER: a POINTS: 1 REFERENCES: 297 Copyright Cengage Learning. Powered by Cognero.

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Chapter 07: Hydronic Circulators QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 7:08 AM DATE MODIFIED: 8/8/2022 7:09 AM 28. Another way of installing circulators in series is called a(n)__________________. a. equal pull b. push/pull arrangement c. modern series d. uniform ANSWER: b POINTS: 1 REFERENCES: 273 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 7:10 AM DATE MODIFIED: 8/8/2022 7:12 AM 29. One of the biggest advancements in hydronic heating technology over the past two decades is the development of circulators that can________________ to adjust to differential pressure changes within the distribution system. a. automatically vary their speed b. manually vary their speed c. electrically very their speed d. uniformly vary their speed ANSWER: a POINTS: 1 REFERENCES: 275 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 7:42 AM DATE MODIFIED: 8/8/2022 7:42 AM 30. One of the newest features available on some ECM-based circulators is the ability to extract operating information such as input power, flow rate, and head using the ______________. a. internet communication feature b. Bluetooth communication protocol c. electronic internet feature d. power-range feature ANSWER: b POINTS: 1 REFERENCES: 299 QUESTION TYPE: Multiple Choice HAS VARIABLES: False Copyright Cengage Learning. Powered by Cognero.

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Chapter 07: Hydronic Circulators DATE CREATED: 8/8/2022 7:43 AM DATE MODIFIED: 8/8/2022 7:45 AM

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Chapter 08: Heat Emitters 1. The balance between convective heat transfer and radiative heat transfer can significantly affect the comfort achieved by various heat emitters. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 308 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 4:48 AM DATE MODIFIED: 8/8/2022 4:55 AM 2. Finned-tube baseboard convectors operate on the principle that heated air rises due to its lower density. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 308 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 4:57 AM DATE MODIFIED: 8/8/2022 4:58 AM 3. As a rule, convectors are well suited for rooms with high ceilings. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 310 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 5:08 AM DATE MODIFIED: 8/8/2022 5:09 AM 4. Parallel piping methods allow independent flow rate adjustment for each baseboard. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 324 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 5:09 AM Copyright Cengage Learning. Powered by Cognero.

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Chapter 08: Heat Emitters DATE MODIFIED: 8/8/2022 5:10 AM 5. When rooms lack the wall space needed to mount finned-tube baseboard, one alternative is to use a hydronic fan-coil or air handler. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 327 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 5:10 AM DATE MODIFIED: 8/8/2022 5:11 AM 6. The heat output of a fan-coil is approximately proportional to the temperature difference between the entering air and entering water. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 336 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 5:11 AM DATE MODIFIED: 8/8/2022 5:12 AM 7. The rate of heat transfer depends on either the temperature difference or the flow rate. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 339 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 5:12 AM DATE MODIFIED: 8/8/2022 5:13 AM 8. Panel radiators typically require much more wall space than fin-tube baseboard sized for equivalent heat output and operating conditions. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 340 Copyright Cengage Learning. Powered by Cognero.

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Chapter 08: Heat Emitters QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 5:13 AM DATE MODIFIED: 8/8/2022 5:13 AM 9. Reverse return piping encourages equal flow rates and equal supply temperature to each radiator. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 354 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 5:13 AM DATE MODIFIED: 8/8/2022 5:14 AM 10. A rule of thumb is to allow twice the linear footage of radiant baseboard compared to typical residential finned-tube baseboard. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 357 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 5:14 AM DATE MODIFIED: 8/8/2022 5:15 AM 11. A typical finned-tube baseboard convector consists of a sheet metal enclosure containing a ____ tube fitted with aluminum fins. a. copper b. PEX c. cast iron d. stainless steel ANSWER: a POINTS: 1 REFERENCES: 308 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 5:15 AM DATE MODIFIED: 8/8/2022 5:16 AM 12. The heat output of finned-tube baseboard is expressed in Btu/hr./ft. of active element length. The active length of the element is the length of pipe ____.

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Chapter 08: Heat Emitters a. under a source of downward drafts b. nearest the riser’s centerline c. covered with fins d. in the entire assembly ANSWER: c POINTS: 1 REFERENCES: 312 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 5:17 AM DATE MODIFIED: 8/8/2022 5:18 AM 13. When baseboards are connected ____, each receives water at the temperature supplied to the manifold. a. in series b. in parallel c. with copper tubing d. to a thermostat ANSWER: b POINTS: 1 REFERENCES: 325 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 5:18 AM DATE MODIFIED: 8/8/2022 5:19 AM 14. Hydronic fan-coils have two common components—a(n) ____ heat exchanger (often called the “coil”) through which system fluid flows and a blower or fan that forces air to flow across the coil. a. ceramic b. cast iron c. open-looped d. finned-tube ANSWER: d POINTS: 1 REFERENCES: 327 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 5:19 AM DATE MODIFIED: 8/8/2022 5:20 AM 15. Increasing the fluid flow rate through the coil will ____ increase the heating capacity of the fan-coil. a. greatly b. never c. unpredictably Copyright Cengage Learning. Powered by Cognero.

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Chapter 08: Heat Emitters d. marginally ANSWER: d POINTS: 1 REFERENCES: 338 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 5:20 AM DATE MODIFIED: 8/8/2022 5:21 AM 16. To prevent corrosion, steel panel radiators should only be used in ____ systems. a. open-loop b. closed-loop c. parallel d. hydraulically calibrated ANSWER: b POINTS: 1 REFERENCES: 340 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 5:21 AM DATE MODIFIED: 8/8/2022 5:22 AM 17. Operating panel radiators at ____ water temperatures increases the percentage of radiant versus convective heat output from the panel. a. lower b. higher c. thermally equalized d. ambient ANSWER: a POINTS: 1 REFERENCES: 341 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 5:22 AM DATE MODIFIED: 8/8/2022 5:22 AM 18. The head loss of radiant baseboard can be determined by considering each baseboard to be a tubing circuit approximately ____ as long as the baseboard extrusion. a. twice b. half c. equally d. three times ANSWER: a Copyright Cengage Learning. Powered by Cognero.

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Chapter 08: Heat Emitters POINTS: 1 REFERENCES: 357 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 5:23 AM DATE MODIFIED: 8/8/2022 5:24 AM 19. One way that heat loss of bare copper tube can be evaluated is when the length of the copper tube in feet divided by the flow rate in gallons per minute exceeds ____ ft./gpm, there will be a greater temperature drop along the tube from inlet to outlet. a. 5 b. 10 c. 15 d. 20 ANSWER: d POINTS: 1 REFERENCES: 359 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 5:24 AM DATE MODIFIED: 8/8/2022 5:25 AM 20. Every hydronic heating system attempts to establish operating conditions that allow the distribution system to current rate of heat output from the heat source. This state is known as ____. a. hydraulic channeling b. thermal equilibrium c. reverse return flow d. radiant heat output ANSWER: b POINTS: 1 REFERENCES: 361 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 5:26 AM DATE MODIFIED: 8/8/2022 5:27 AM 21. Hydronic system designers must select and size heat emitters for a given project, so that__________ are achieved in all areas of the building. a. heating and cooling b. comfort and control c. humidity and moisture d. air pressure and temperature ANSWER: b Copyright Cengage Learning. Powered by Cognero.

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Chapter 08: Heat Emitters POINTS: 1 REFERENCES: 307 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 5:27 AM DATE MODIFIED: 8/8/2022 5:28 AM 22. Finned-tube baseboard convectors operate on the principle that__________ due to its lower density. a. heated air rises b. heated air normalizes c. cooled air normalizes d. cooled air rises ANSWER: a POINTS: 1 REFERENCES: 308 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 5:28 AM DATE MODIFIED: 8/8/2022 5:29 AM 23. Whenever air is used to transport heat, ______ movement can become a problem. a. germ b. moisture c. dust d. pollen ANSWER: c POINTS: 1 REFERENCES: 310 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 5:29 AM DATE MODIFIED: 8/8/2022 5:30 AM 24. Low-temperature heat sources such as condensing boilers and hydronic heat pumps are becoming increasingly common in____ hydronic systems. a. modern b. residential c. commercial d. industrial ANSWER: a POINTS: 1 REFERENCES: 315 QUESTION TYPE: Multiple Choice Copyright Cengage Learning. Powered by Cognero.

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Chapter 08: Heat Emitters HAS VARIABLES: False DATE CREATED: 8/8/2022 5:31 AM DATE MODIFIED: 8/8/2022 5:31 AM 25. Preliminary lengths of finned-tube baseboard can be selected by basing the_______ of each baseboard on the average temperature of the fluid in the piping circuit. a. pressure range b. thermal output c. moisture content d. heat output ANSWER: d POINTS: 1 REFERENCES: 320 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 5:32 AM DATE MODIFIED: 8/8/2022 5:33 AM 26. One of the most practical methods for connecting baseboards into parallel circuits in residential and light commercial systems is called a_______________. a. pressure distribution system b. thermal distribution system c. moisture control system d. homerun distribution system ANSWER: d POINTS: 1 REFERENCES: 324 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 5:33 AM DATE MODIFIED: 8/8/2022 5:34 AM 27. The term fan-coil applies to units that are mounted within_____________. Some fan-coils use a propellertype__________ by a motor to create airflow across the coil. a. building chases b. hallways, fan driven c. occupied spaces, fan driven d. rooms, electronic fan driven ANSWER: c POINTS: 1 REFERENCES: 327 QUESTION TYPE: Multiple Choice HAS VARIABLES: False Copyright Cengage Learning. Powered by Cognero.

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Chapter 08: Heat Emitters DATE CREATED: 8/8/2022 5:35 AM DATE MODIFIED: 8/8/2022 5:38 AM 28. Many types of fan-coils will produce some noise due to the___________. a. blower operation b. loose bolts and washers c. slipping belts d. loose filters ANSWER: a POINTS: 1 REFERENCES: 328 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 5:40 AM DATE MODIFIED: 8/8/2022 5:41 AM 29. The heat output of a fan-coil is approximately proportional to the temperature difference between the________________. a. exiting air and exiting water b. entering air and entering water c. hot and cold water d. warm and cool air ANSWER: b POINTS: 1 REFERENCES: 336 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 5:41 AM DATE MODIFIED: 8/8/2022 5:42 AM 30. Most panel radiators are made of steel. Some are built of____________ welded together at their perimeter. a. preformed steel sheets b. aluminum sheets c. wrought iron d. a super metal alloy ANSWER: a POINTS: 1 REFERENCES: 340 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 5:42 AM DATE MODIFIED: 8/8/2022 5:43 AM Copyright Cengage Learning. Powered by Cognero.

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Chapter 08: Heat Emitters 31. Unlike finned-tube baseboards, radiant baseboards have_________. a. aluminum fins b. flat fins c. no fins d. small fins ANSWER: c POINTS: 1 REFERENCES: 355 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 5:43 AM DATE MODIFIED: 8/8/2022 5:46 AM

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Chapter 09: Control Strategies, Components, and Systems 1. Desired temperatures, pressures, and flow rates are examples of analog inputs. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 370 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 4:10 AM DATE MODIFIED: 8/8/2022 4:10 AM 2. Closed-loop control systems can be tuned for very stable operation by using the feedback inherent to their design. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 370 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 4:11 AM DATE MODIFIED: 8/8/2022 4:11 AM 3. Heat output from the heat emitter occurs whenever the supply water temperature equals the room air temperature. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 382 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 4:12 AM DATE MODIFIED: 8/8/2022 4:12 AM 4. The combination of near-continuous circulation and very gradual changes in water temperature tends to maximize expansion noises from the distribution piping and heat emitters. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 385 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 4:13 AM Copyright Cengage Learning. Powered by Cognero.

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Chapter 09: Control Strategies, Components, and Systems DATE MODIFIED: 8/8/2022 4:13 AM 5. Most heat source reset controllers have an adjustable minimum supply temperature. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 392 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 4:13 AM DATE MODIFIED: 8/8/2022 4:14 AM 6. Relay contacts are designated as normally open, or normally closed. In this context, the word “normally” means when the coil of the relay is not energized. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 400 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 4:14 AM DATE MODIFIED: 8/8/2022 4:16 AM 7. There are hydronic heating applications where control action is required based on the difference between two temperatures rather than the value of either temperature. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 416 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 4:17 AM DATE MODIFIED: 8/8/2022 4:18 AM 8. A multizone relay center is designed to organize the wiring and control operation of several independent zone circulators or zone valves. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 424 Copyright Cengage Learning. Powered by Cognero.

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Chapter 09: Control Strategies, Components, and Systems QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 4:18 AM DATE MODIFIED: 8/8/2022 4:19 AM 9. One purpose of mixing is to protect conventional boilers from operating at conditions that allow sustained flue gas condensation. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 432 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 4:19 AM DATE MODIFIED: 8/8/2022 4:20 AM 10. Communicating control systems reduce component redundancy and interference by allowing all controllers to interact with each other. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 462 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 4:20 AM DATE MODIFIED: 8/8/2022 4:21 AM 11. The proper documentation of control systems is essential if they are to be expediently serviced in the future. A universally accepted tool for such documentation is the ____. a. microprocessor b. ladder diagram c. designer spreadsheet d. flow chart ANSWER: b POINTS: 1 REFERENCES: 369 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 4:21 AM DATE MODIFIED: 8/8/2022 4:23 AM 12. The term ____ differential refers to the actual variation in the controlled variable as the system operates.

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Chapter 09: Control Strategies, Components, and Systems a. control b. modulating c. operating d. real-time ANSWER: c POINTS: 1 REFERENCES: 374 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 4:23 AM DATE MODIFIED: 8/8/2022 4:25 AM 13. To provide accurate control under low-load conditions, the controlled device must be able to maintain stable flow at very low flow rates. Such a device is said to have good ____. a. modulation b. variability c. machining d. rangeability ANSWER: d POINTS: 1 REFERENCES: 383 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 4:25 AM DATE MODIFIED: 8/8/2022 4:26 AM 14. As outdoor temperature increases, and the heating load decreases, the water temperature supplied to the heat emitters also decreases as does their heat output. This concept is called outdoor ____ control. a. temperature b. variable c. proportional d. reset ANSWER: d POINTS: 1 REFERENCES: 385 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 4:26 AM DATE MODIFIED: 8/8/2022 4:29 AM 15. Switches and relays are classified according to their poles and throws. The number of ____ is the number of independent and simultaneous electrical paths through the switch. a. poles Copyright Cengage Learning. Powered by Cognero.

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Chapter 09: Control Strategies, Components, and Systems b. throws c. contacts d. wires ANSWER: a POINTS: 1 REFERENCES: 399 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 4:30 AM DATE MODIFIED: 8/8/2022 4:32 AM 16. ____ control is a planned strategy for shedding (e.g., temporarily turning off) one or more loads when a specific condition is detected in the system. a. Error b. Priority c. Systemic d. Conditional ANSWER: b POINTS: 1 REFERENCES: 405 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 4:32 AM DATE MODIFIED: 8/8/2022 4:34 AM 17. In addition to equal run time rotation, there are other operating options available for staged/modulating heat sources.

They are called series staging/modulation, parallel staging/modulation, and ____ staging/modulation. a. proportional b. on/off c. multiple d. hybrid ANSWER: d POINTS: 1 REFERENCES: 434 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 4:34 AM DATE MODIFIED: 8/8/2022 4:36 AM 18. Boiler protection is accomplished by ____ the rate of heat flow from the boiler into the distribution system whenever the boiler temperature approaches or falls below a specified minimum operating temperature. a. reducing b. resetting Copyright Cengage Learning. Powered by Cognero.

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Chapter 09: Control Strategies, Components, and Systems c. increasing d. stabilizing ANSWER: a POINTS: 1 REFERENCES: 438 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 4:36 AM DATE MODIFIED: 8/8/2022 4:41 AM 19. The term injection mixing applies to any mixing assembly in which ____ is pushed (e.g., injected) into a circulating distribution system. a. coolant b. air c. hot water d. mercury ANSWER: c POINTS: 1 REFERENCES: 446 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 4:42 AM DATE MODIFIED: 8/8/2022 4:43 AM 20. Communicating control systems reduce component redundancy and interference by allowing all controllers to interact with each other. In most cases, these devices are all part of a(n) ___________. a. communication bus b. digital address c. electromechanical d. networked control system.

ANSWER: a POINTS: 1 REFERENCES: 462 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 4:43 AM DATE MODIFIED: 8/8/2022 4:45 AM 21. A(n) _____________ provides a communication interface to a wireless internet router. Software that allows the user to communicate with any device on the network can be loaded to a laptop computer, smartphone, or tablet. a. network control system b. electronic switch c. electromechanical device Copyright Cengage Learning. Powered by Cognero.

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Chapter 09: Control Strategies, Components, and Systems d. network interface module ANSWER: d POINTS: 1 REFERENCES: 463 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 4:45 AM DATE MODIFIED: 8/8/2022 4:46 AM 22. The term __________ applies to any mixing assembly in which hot water is pushed (e.g., injected) into a circulating distribution system. a. coolant b. air c. injection mixing d. mercury ANSWER: c POINTS: 1 REFERENCES: 446 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 4:47 AM DATE MODIFIED: 8/8/2022 4:49 AM 23. Boiler protection is accomplished by reducing the rate of heat flow from the boiler into the__________ whenever the boiler temperature approaches or falls below a specified minimum operating temperature. a. distribution system b. resetting c. increasing d. stabilizing ANSWER: a POINTS: 1 REFERENCES: 438 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 4:49 AM DATE MODIFIED: 8/8/2022 4:50 AM 24. Priority control is a planned strategy for shedding (e.g., temporarily turning off) one or more loads when a(n)______ condition is detected in the system. a. error b. specific c. systemic d. conditional Copyright Cengage Learning. Powered by Cognero.

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Chapter 09: Control Strategies, Components, and Systems ANSWER: b POINTS: 1 REFERENCES: 405 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 4:50 AM DATE MODIFIED: 8/8/2022 4:52 AM 25. Switches and______ are classified according to their poles and throws. The number of poles is the number of independent and simultaneous electrical paths through the switch. a. relays b. throws c. contacts d. wires ANSWER: a POINTS: 1 REFERENCES: 399 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 4:52 AM DATE MODIFIED: 8/8/2022 4:53 AM 26. As________ temperature increases, and the heating load decreases, the water temperature supplied to the heat emitters also decreases as does their heat output. This concept is called outdoor reset control. a. temperature b. variable c. proportional d. outdoor ANSWER: d POINTS: 1 REFERENCES: 385 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 4:54 AM DATE MODIFIED: 8/8/2022 4:55 AM 27. To provide accurate control under low-load conditions, the controlled device must be able to maintain _________ at very low flow rates. Such a device is said to have good rangeability. a. modulation b. variability c. machining d. stable flow ANSWER: d Copyright Cengage Learning. Powered by Cognero.

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Chapter 09: Control Strategies, Components, and Systems POINTS: 1 REFERENCES: 383 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 4:55 AM DATE MODIFIED: 8/8/2022 4:56 AM 28. The greater the rate of___________, the warmer the mixed supply temperature becomes and the greater the heat output of the distribution system. a. hot water injection b. tempered water injection c. cold water injection d. warm water injection ANSWER: a POINTS: 1 REFERENCES: 446 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 4:57 AM DATE MODIFIED: 8/8/2022 4:58 AM 29. The___________ measures the temperature supplied to the distribution system. a. sensing bulb b. temperature bulb c. lighting bulb d. warming bulb ANSWER: a POINTS: 1 REFERENCES: 447 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 4:58 AM DATE MODIFIED: 8/8/2022 5:02 AM 30. Rapid progress in___________ control technology has had a major impact on the hydronic heating industry over the past three decades. a. system-based b. microprocessor-fault c. microprocessor-based d. water-based ANSWER: c POINTS: 1 REFERENCES: 462 Copyright Cengage Learning. Powered by Cognero.

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Chapter 09: Control Strategies, Components, and Systems QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 5:02 AM DATE MODIFIED: 8/8/2022 5:03 AM

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Chapter 10: Hydronic Radiant Panel Heating 1. Thermal radiation is constantly emitted from our skin and clothing surfaces to any cooler surfaces around us. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 470 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 4:13 AM DATE MODIFIED: 8/8/2022 4:16 AM 2. The best-known type of hydronic radiant panel is a heated floor. Currently, floors account for over 90% of all hydronic radiant panel installations. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 471 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 4:14 AM DATE MODIFIED: 8/8/2022 4:17 AM 3. Hydronic radiant panel heating, like other types of hydronic heating, are not easily configured for room-by-room zoning. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 474 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 4:14 AM DATE MODIFIED: 8/8/2022 4:18 AM 4. The size of the tubing used in a heated slab has a relatively small effect on the slab’s heat output. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 477 QUESTION TYPE: True / False HAS VARIABLES: False Copyright Cengage Learning. Powered by Cognero.

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Chapter 10: Hydronic Radiant Panel Heating DATE CREATED: 8/8/2022 4:14 AM DATE MODIFIED: 8/8/2022 4:18 AM 5. The availability of insulation in various materials and thicknesses will in part determine the R-value installed. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 481 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 4:14 AM DATE MODIFIED: 8/8/2022 4:19 AM 6. Gypsum underlayment contains considerably more water than does an equal volume of concrete. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 493 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 4:14 AM DATE MODIFIED: 8/8/2022 4:20 AM 7. Suspended tube systems operate at relatively low water temperatures in comparison to other types of radiant panels. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 510 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 4:15 AM DATE MODIFIED: 8/8/2022 4:20 AM 8. Most radiant ceiling panels have low thermal mass allowing them to slowly warm up following a cold start. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 518 QUESTION TYPE: True / False Copyright Cengage Learning. Powered by Cognero.

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Chapter 10: Hydronic Radiant Panel Heating HAS VARIABLES: False DATE CREATED: 8/8/2022 4:15 AM DATE MODIFIED: 8/8/2022 4:21 AM 9. In the case of floor heating, the average surface temperature of the floor should not exceed 85° F in rooms where prolonged foot contact with the floor is likely. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 536 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 4:15 AM DATE MODIFIED: 8/8/2022 4:22 AM 10. In most cases, the system piping method and control technique used are mutually dependent. One cannot be used without the other. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 548 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 4:15 AM DATE MODIFIED: 8/8/2022 4:22 AM 11. Radiant heating is the process of transferring thermal energy from one object to another by ____. a. convection b. conduction c. nuclear radiation d. thermal radiation ANSWER: d POINTS: 1 REFERENCES: 470 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 4:26 AM DATE MODIFIED: 8/8/2022 4:55 AM 12. A hydronic radiant panel is any object warmed by passing heated water through tubing embedded in or attached to it, and which releases at least ____ of that heat to its surroundings as thermal radiation, and has a controlled surface temperature under 300 °F. Copyright Cengage Learning. Powered by Cognero.

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Chapter 10: Hydronic Radiant Panel Heating a. 80% b. 60% c. 50% d. 40% ANSWER: c POINTS: 1 REFERENCES: 471 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 4:28 AM DATE MODIFIED: 8/8/2022 4:57 AM 13. The profiles for baseboard convectors and forced-air systems reveal lower than ideal temperatures near the floor, as well as higher than ideal temperatures near the ceiling. This undesirable effect is called air temperature ____. a. discharge b. stratification c. modulation d. wastage ANSWER: b POINTS: 1 REFERENCES: 476 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 4:28 AM DATE MODIFIED: 8/8/2022 4:58 AM 14. All hydronic radiant panel systems are created by placing tubing into the ____ of a room. a. outer perimeter b. floor, walls, or ceiling c. areas of thermal loss d. heat loss zone ANSWER: b POINTS: 1 REFERENCES: 476 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 4:28 AM DATE MODIFIED: 8/8/2022 5:06 AM 15. Poured gypsum underlayments have been used for many years to level uneven floor surfaces, as well as to decrease sound transmission and increase the fire resistance of floor assemblies. They are now widely used for ____ radiant floor heating. a. thin-slab Copyright Cengage Learning. Powered by Cognero.

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Chapter 10: Hydronic Radiant Panel Heating b. slab-on-grade c. concrete slab d. suspended ANSWER: a POINTS: 1 REFERENCES: 493 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 4:28 AM DATE MODIFIED: 8/8/2022 5:15 AM 16. In some buildings, slab or thin-slab-type radiant panels are not possible. One alternative is called a tube and plate system. Instead of concrete or gypsum, this system uses ____ heat transfer plates to laterally conduct heat away from the tubing. a. PEX b. flanged c. graphite d. preformed aluminum ANSWER: d POINTS: 1 REFERENCES: 497 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 4:28 AM DATE MODIFIED: 8/8/2022 5:16 AM 17. Another circuit routing pattern for floors is called a ____. This tubing pattern is not designed to bias heat output toward exterior walls. Instead, it is intended to provide the same average heat output over the entire floor area. a. serpentine b. zigzag c. counterflow d. core ANSWER: c POINTS: 1 REFERENCES: 522 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 4:28 AM DATE MODIFIED: 8/8/2022 5:18 AM 18. One principle of tubing design is to install manifold stations in central locations to ____ tubing runs between the manifold station and the room(s) to be heated. a. straighten Copyright Cengage Learning. Powered by Cognero.

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Chapter 10: Hydronic Radiant Panel Heating b. minimize c. maximize d. economize on ANSWER: b POINTS: 1 REFERENCES: 525 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 4:29 AM DATE MODIFIED: 8/8/2022 5:19 AM 19. The useful heat output of a radiant panel is expressed as the rate of heat flow into the room per unit of area of radiant panel surface. This is called the room side ____. a. variance b. temperature degree c. heat “sink” d. heat flux ANSWER: d POINTS: 1 REFERENCES: 532 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 4:29 AM DATE MODIFIED: 8/8/2022 5:20 AM 20. When circuit lengths are significantly different, or when circuits supplied from the same manifold station will operate as separate zones, a(n) ____ manifold station should be used. a. valveless b. circuit-balance c. actuated d. valved ANSWER: d POINTS: 1 REFERENCES: 550 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 4:29 AM DATE MODIFIED: 8/8/2022 5:21 AM 21. _______manifolds allow individual flow adjustment of each circuit. a. Valveless b. Valved c. Actuated Copyright Cengage Learning. Powered by Cognero.

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Chapter 10: Hydronic Radiant Panel Heating d. Pressure ANSWER: b POINTS: 1 REFERENCES: 550 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 4:29 AM DATE MODIFIED: 8/8/2022 5:22 AM 22. The author has studied this situation using_____________ software that was configured to simulate two-dimensional heat transfer across a section of heated floor. a. element analysis (EA) b. circuit-balance c. infinite element analysis (IEA) d. finite element analysis (FEA) ANSWER: d POINTS: 1 REFERENCES: 478 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 4:29 AM DATE MODIFIED: 8/8/2022 5:24 AM 23. Under-slab insulation is installed over the vapor barrier. Although several options are available, _________________is a commonly used material with a proven track record in such applications. a. fiberglass b. extruded polystyrene foam c. cotton d. plastic ANSWER: b POINTS: 1 REFERENCES: 481 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 4:30 AM DATE MODIFIED: 8/8/2022 5:33 AM 24. ____________should remember that individual room thermostats, or thermostatically regulated valves, are not needed simply because some rooms need to be maintained at different temperatures. a. Designers b. Plumbers c. HVAC technicians d. Inspectors Copyright Cengage Learning. Powered by Cognero.

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Chapter 10: Hydronic Radiant Panel Heating ANSWER: a POINTS: 1 REFERENCES: 525 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 4:30 AM DATE MODIFIED: 8/8/2022 5:35 AM 25. The principle of__________ circuit layout is often the dominant concept that determines how a building is divided into individual circuits. a. system b. piping c. room-by-room d. pressure ANSWER: c POINTS: 1 REFERENCES: 525 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 4:30 AM DATE MODIFIED: 8/8/2022 5:36 AM 26. An important part of planning a___________ is producing a circuit layout drawing. a. circulator b. piping system c. radiant panel system d. pressure valve ANSWER: c POINTS: 1 REFERENCES: 528 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 4:30 AM DATE MODIFIED: 8/8/2022 5:37 AM 27. The possibilities for building_______ radiant panels using different materials, dimensions, and installation techniques are virtually unlimited. a. hybrid b. solid c. electric d. large ANSWER: a POINTS: 1 Copyright Cengage Learning. Powered by Cognero.

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Chapter 10: Hydronic Radiant Panel Heating REFERENCES: 531 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 4:32 AM DATE MODIFIED: 8/8/2022 5:39 AM 28. The term___________ describes the area of the floor that is heated and not covered by objects capable of blocking upward heat flows. a. total floor area b. full floor area c. heated floor area d. available floor area ANSWER: d POINTS: 1 REFERENCES: 534 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 4:32 AM DATE MODIFIED: 8/8/2022 5:40 AM 29. For gypsum-covered wall or ceiling panels, the surface temperature of the panel should not exceed _____. a. 120°F b. 140°F c. 90°F d. 100°F ANSWER: a POINTS: 1 REFERENCES: 536 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 4:32 AM DATE MODIFIED: 8/8/2022 5:41 AM 30. In areas such as bathrooms, foyers, entries, or the outer perimeter of rooms, the average surface temperature of the floor should not exceed ____. a. 92°F b. 100°F c. 60°F d. 110°F ANSWER: a POINTS: 1 REFERENCES: 536 QUESTION TYPE: Multiple Choice Copyright Cengage Learning. Powered by Cognero.

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Chapter 10: Hydronic Radiant Panel Heating HAS VARIABLES: False DATE CREATED: 8/8/2022 4:32 AM DATE MODIFIED: 8/8/2022 5:42 AM

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Chapter 11: Distribution Piping Systems 1. A zone is any area of a building for which indoor air temperature is controlled by a single thermostat (or other type of temperature controller). a. True b. False ANSWER: True POINTS: 1 REFERENCES: 564 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 4:06 AM DATE MODIFIED: 8/8/2022 4:08 AM 2. Different rooms within a single zone (e.g., controlled by a single thermostat) and supplied with the same water temperature cannot be maintained at different temperatures by adjusting the flow rate through individual heat emitters. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 566 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 4:09 AM DATE MODIFIED: 8/8/2022 4:10 AM 3. If the heat emitters are connected in series, the system flow rate will pass through each heat emitter. If the heat emitters are connected in parallel, the flow rate through each heat emitter can be proportioned based on load using an equation. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 568 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 4:10 AM DATE MODIFIED: 8/8/2022 4:11 AM 4. Given the surface area of their bodies, hydraulic separators should be insulated to minimize heat loss to their surroundings. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 583 QUESTION TYPE: True / False Copyright Cengage Learning. Powered by Cognero.

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Chapter 11: Distribution Piping Systems HAS VARIABLES: False DATE CREATED: 8/8/2022 4:12 AM DATE MODIFIED: 8/8/2022 4:13 AM 5. Designers should think of hydraulic separation as a physical concept that must be accomplished as an all-or-nothing condition. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 585 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 4:13 AM DATE MODIFIED: 8/8/2022 4:15 AM 6. When a circulator with the flat curve is used, the differential pressure across the circulator changes dramatically as zone circuits turn on and off. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 595-596 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 4:19 AM DATE MODIFIED: 8/8/2022 4:20 AM 7. The electronically commutated motors and improved hydrodynamic design of current generation variable-speed pressure-regulated circulators provide wire-to-water efficiencies that are approximately double those of standard wet-rotor circulators with permanent split capacity. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 598-599 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 4:22 AM DATE MODIFIED: 8/8/2022 4:23 AM 8. If a fixed-speed circulator is selected, a differential pressure bypass valve should be installed to reduce the potential for flow noise when only one or two zones are active. a. True Copyright Cengage Learning. Powered by Cognero.

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Chapter 11: Distribution Piping Systems b. False ANSWER: True POINTS: 1 REFERENCES: 604 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 4:23 AM DATE MODIFIED: 8/8/2022 4:24 AM 9. Over the last two decades, many heating professionals have come to recognize the failure of PEX and PEX-AL-PEX tubing as universal piping materials for residential and light commercial hydronic systems. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 606 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 4:24 AM DATE MODIFIED: 8/8/2022 4:25 AM 10. Primary/secondary (P/S) piping is the only way to achieve hydraulic separation between simultaneously operating circulators. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 610 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 4:25 AM DATE MODIFIED: 8/8/2022 4:27 AM 11. The time required to cool down or warm up a zone is significantly affected by the ____ of the heat emitter(s), and the building itself. a. thermal envelope b. thermal mass c. ambient temperature d. setpoint temperature ANSWER: b POINTS: 1 REFERENCES: 565 QUESTION TYPE: Multiple Choice Copyright Cengage Learning. Powered by Cognero.

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Chapter 11: Distribution Piping Systems HAS VARIABLES: False DATE CREATED: 8/8/2022 8:39 PM DATE MODIFIED: 8/8/2022 8:40 PM 12. All hydronic systems, regardless of how they are designed or installed, attempt to simultaneously stabilize at two unique operating conditions called thermal equilibrium and ____ equilibrium. a. spatial b. hydraulic c. zoning d. R-value ANSWER: b POINTS: 1 REFERENCES: 567 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 8:40 PM DATE MODIFIED: 8/8/2022 8:41 PM 13. In a technique known as ____, the designer repeatedly analyzes both the hydraulic and thermal performance of a system using “candidate” hardware options and operating conditions, until a combination is found that yields acceptable heat distribution. a. trial and error b. selective pairing c. elimination d. iteration ANSWER: d POINTS: 1 REFERENCES: 568 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 8:41 PM DATE MODIFIED: 8/8/2022 8:42 PM 14. Ideally, each circulator in a system will establish a differential pressure and flow rates that is unaffected by the presence of another operating circulator within the system. This very desirable condition is called ____. a. hydraulic equilibrium b. hydraulic separation c. the pump curve d. ideal circulation ANSWER: b POINTS: 1 REFERENCES: 577 QUESTION TYPE: Multiple Choice Copyright Cengage Learning. Powered by Cognero.

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Chapter 11: Distribution Piping Systems HAS VARIABLES: False DATE CREATED: 8/8/2022 8:42 PM DATE MODIFIED: 8/8/2022 8:43 PM 15. The degree to which two operating circulators interact with each other depends on the head loss of the piping path they have in common. This piping path is called the ____ piping. a. circulatory b. serpentine c. head loss d. common ANSWER: d POINTS: 1 REFERENCES: 577 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 8:43 PM DATE MODIFIED: 8/8/2022 8:44 PM 16. The purpose of differential pressure bypass valves (DPBV) is to ____ the differential pressure imposed on the distribution system by a fixed-speed circulator as the system flow rate decreases due to closing zone valves. a. accelerate b. equalize c. limit d. increase ANSWER: c POINTS: 1 REFERENCES: 596 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 8:44 PM DATE MODIFIED: 8/8/2022 8:45 PM 17. One approach that takes advantage of the flexibility of PEX or PEX-AL-PEX tubing is called a ____ distribution system. a. hydroplastic b. home run c. hybrid d. green ANSWER: b POINTS: 1 REFERENCES: 606 QUESTION TYPE: Multiple Choice HAS VARIABLES: False Copyright Cengage Learning. Powered by Cognero.

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Chapter 11: Distribution Piping Systems DATE CREATED: 8/8/2022 8:45 PM DATE MODIFIED: 8/8/2022 8:46 PM 18. The closely spaced tees connecting a secondary circuit to the primary circuit are ____ when air is being purged from the system. a. counterproductive b. instrumental c. essential d. irrelevant ANSWER: a POINTS: 1 REFERENCES: 620 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 8:46 PM DATE MODIFIED: 8/8/2022 8:47 PM 19. The concept of ____ provides a means by which the electrical energy consumption of a distribution system, per unit of heat delivery capacity, can be calculated and compared. a. hydraulic separation b. hydraulic equilibrium c. thermal envelope d. distribution efficiency ANSWER: d POINTS: 1 REFERENCES: 622 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 8:47 PM DATE MODIFIED: 8/8/2022 8:48 PM 20. The diverse loads served by many modern residential and light commercial systems often dictate that the distribution system contains elements from ____ of the basic distribution systems discussed in this chapter. a. four of more b. two or more c. at least three d. possibly none ANSWER: b POINTS: 1 REFERENCES: 625 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 8:48 PM Copyright Cengage Learning. Powered by Cognero.

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Chapter 11: Distribution Piping Systems DATE MODIFIED: 8/8/2022 8:50 PM 21. The concept of distribution efficiency provides a means by which the______ energy consumption of a distribution system, per unit of heat delivery capacity, can be calculated and compared. a. hydraulic separation b. hydraulic equilibrium c. thermal envelope d. electrical ANSWER: d POINTS: 1 REFERENCES: 622 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 8:50 PM DATE MODIFIED: 8/8/2022 8:51 PM 22. The_______ served by many modern residential and light commercial systems often dictate that the distribution system contains elements from two or more of the basic distribution systems discussed in this chapter. a. primary loads b. diverse loads c. cycle loads d. power loads ANSWER: b POINTS: 1 REFERENCES: 625 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 8:51 PM DATE MODIFIED: 8/8/2022 8:52 PM 23. The closely spaced tees connecting a secondary circuit to the primary circuit are counterproductive when______ is/are being purged from the system. a. air b. water c. steam d. particles ANSWER: a POINTS: 1 REFERENCES: 620 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 8:52 PM DATE MODIFIED: 8/8/2022 8:53 PM Copyright Cengage Learning. Powered by Cognero.

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Chapter 11: Distribution Piping Systems 24. The purpose of differential pressure bypass valves (DPBV) is to limit the differential pressure imposed on the distribution system by a_________ circulator as the system flow rate decreases due to closing zone valves. a. 5-speed b. 3-speed c. fixed-speed d. variable-speed ANSWER: c POINTS: 1 REFERENCES: 596 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 8:53 PM DATE MODIFIED: 8/8/2022 8:54 PM 25. The degree to which two operating circulators interact with each other depends on the______ of the piping path they have in common. This piping path is called the common piping. a. circulatory b. flow direction c. head loss d. pressure ANSWER: c POINTS: 1 REFERENCES: 577 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 8:54 PM DATE MODIFIED: 8/8/2022 8:55 PM 26. The closely spaced tees connecting a secondary circuit to the_________ circuit are counterproductive when air is being purged from the system. a. primary b. instrumental c. essential d. irrelevant ANSWER: a POINTS: 1 REFERENCES: 620 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 8:55 PM DATE MODIFIED: 8/8/2022 8:56 PM 27. The time required to cool down or warm up a_______ is significantly affected by the thermal mass of the heat emitter(s), and the building itself.

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Chapter 11: Distribution Piping Systems a. section b. zone c. quadrant d. portion ANSWER: b POINTS: 1 REFERENCES: 565 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 8:56 PM DATE MODIFIED: 8/8/2022 8:57 PM 28. Approaches that show how components such as piping, valves, circulators, and heating sources are arranged relative to each other are sometimes called____________ . a. sectional piping b. topologies c. thermal piping d. series design ANSWER: b POINTS: 1 REFERENCES: 564 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 8:57 PM DATE MODIFIED: 8/8/2022 8:57 PM 29. Sadly, the vast majority of complaints about insufficient or poorly proportioned heat delivery are traceable to________ or installed distribution systems, rather than improperly performing heat sources. a. poorly designed b. well designed c. essential designed d. series designed ANSWER: a POINTS: 1 REFERENCES: 564 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 8:58 PM DATE MODIFIED: 8/8/2022 8:58 PM 30. From the standpoint of piping “topology,” home-run distribution systems are very_____ to the zone valve systems. a. under powered compared b. close Copyright Cengage Learning. Powered by Cognero.

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Chapter 11: Distribution Piping Systems c. similar d. different ANSWER: c POINTS: 1 REFERENCES: 610 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 8:58 PM DATE MODIFIED: 8/8/2022 8:59 PM

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Chapter 12: Expansion Tanks 1. All liquids used in hydronic heating systems expand when heated. This thermal expansion is an unavoidable and extremely powerful force of nature. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 635 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 9:02 PM DATE MODIFIED: 8/8/2022 9:04 PM 2. One inherent problem with standard expansion tanks is that the air and water they contain are in direct contact. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 637 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 9:05 PM DATE MODIFIED: 8/8/2022 9:06 PM 3. The air in a standard expansion tank is initially at atmospheric pressure. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 636 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 9:20 PM DATE MODIFIED: 8/8/2022 9:21 PM 4. Standard expansion tanks typically need to be drained and refilled with air at least once each year. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 637 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 9:21 PM Copyright Cengage Learning. Powered by Cognero.

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Chapter 12: Expansion Tanks DATE MODIFIED: 8/8/2022 9:22 PM 5. Many of the shortcomings of standard expansion tanks can be avoided by separating the air and water in an expansion tank. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 639 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 9:27 PM DATE MODIFIED: 8/8/2022 9:28 PM 6. The entire volume of system fluid reaches the maximum fluid temperature simultaneously. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 641 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 9:28 PM DATE MODIFIED: 8/8/2022 9:29 PM 7. Most modern diaphragm-type tanks use a butyl rubber or EPDM diaphragm. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 642 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 9:29 PM DATE MODIFIED: 8/8/2022 9:30 PM 8. It is good practice to install a pressure-regulator valve near the inlet of any expansion tank. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 644 Copyright Cengage Learning. Powered by Cognero.

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Chapter 12: Expansion Tanks QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 9:30 PM DATE MODIFIED: 8/8/2022 9:31 PM 9. The expansion tank should always be connected to the system near the outlet port of the circulator. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 647 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 9:31 PM DATE MODIFIED: 8/8/2022 9:32 PM 10. Many systems with chronic “air problems” can be corrected by simply rearranging the piping so that the circulator pumps away from the point of no pressure change. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 649 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 9:32 PM DATE MODIFIED: 8/8/2022 9:33 PM 11. In a typical closed-loop hydronic system, the extra space caused by heated liquid is usually provided by a separate chamber called the expansion tank. This tank contains a volume of ____ that is compressed. a. air b. gas c. water d. sludge ANSWER: a POINTS: 1 REFERENCES: 636 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 9:34 PM DATE MODIFIED: 8/8/2022 9:34 PM 12. A software module called Expansion Tank Sizer in the Hydronics Design Studio software is an aid for determining tank size and ____.

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Chapter 12: Expansion Tanks a. placement b. pressurization c. type d. brand ANSWER: b POINTS: 1 REFERENCES: 636 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 9:35 PM DATE MODIFIED: 8/8/2022 9:36 PM 13. When ____ occurs, there is no longer a cushion of air for the system’s water to expand against. a. waterlogging b. deaeration c. thermal shutdown d. hydraulic separation ANSWER: a POINTS: 1 REFERENCES: 637 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 9:36 PM DATE MODIFIED: 8/8/2022 9:39 PM 14. The static pressure at the expansion tank connection when the system is filled is based on the height of the system piping above the expansion tank, the type of fluid used, and a customary allowance for ____ psi pressure at the top of the system for proper operation of the air vents. a. 1.5 b. 3.33 c. 5.0 d. 7.5 ANSWER: c POINTS: 1 REFERENCES: 638 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 9:40 PM DATE MODIFIED: 8/8/2022 9:41 PM 15. In a diaphragm-type expansion tank, since the diaphragm separates the fluid from the air, the air ____ the fluid. a. cools b. easily combines with Copyright Cengage Learning. Powered by Cognero.

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Chapter 12: Expansion Tanks c. is proportional to d. cannot be reabsorbed by ANSWER: d POINTS: 1 REFERENCES: 640 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 9:42 PM DATE MODIFIED: 8/8/2022 9:43 PM 16. A properly sized diaphragm-type expansion tank allows the pressure relief valve to reach a pressure of about ____ psi lower than its rated opening pressure when the system reaches its maximum operating temperature. a. 1.25 b. 3.33 c. 5.0 d. 6.66 ANSWER: c POINTS: 1 REFERENCES: 640 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 9:43 PM DATE MODIFIED: 8/8/2022 9:44 PM 17. Expansion tanks have maximum pressure and temperature ratings. This information is stamped on the label of the tank. Typical ratings are ____ psi and 240 F. a. 5.0 b. 60.0 c. 25.0 d. 86.0 ANSWER: b POINTS: 1 REFERENCES: 643 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 9:44 PM DATE MODIFIED: 8/8/2022 9:45 PM 18. The ____ fixes the pressure of the system’s fluid at its point of attachment to the piping. This is called the point of no pressure change. a. circulator b. heat emitter c. expansion tank Copyright Cengage Learning. Powered by Cognero.

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Chapter 12: Expansion Tanks d. diaphragm ANSWER: c POINTS: 1 REFERENCES: 647 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 9:46 PM DATE MODIFIED: 8/8/2022 9:47 PM 19. When ____ circulators are used, the header they connect to should be located close to and just downstream from the point where the expansion tank is connected. a. multiple zone b. variable speed c. hydraulic d. single zone ANSWER: a POINTS: 1 REFERENCES: 650 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 9:47 PM DATE MODIFIED: 8/8/2022 9:49 PM 20. It is ____ to install two or more expansion tanks at different locations within a system. a. standard procedure b. a manufacturer’s recommendation c. not advisable d. the user’s requirement ANSWER: c POINTS: 1 REFERENCES: 651 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 9:49 PM DATE MODIFIED: 8/8/2022 9:51 PM 21. When multiple zone circulators are used, the header they connect to should be located close to and just downstream from the point where the__________ is connected. a. expansion tank b. feed tank c. hydraulic fluid tank d. single-stage tank ANSWER: a Copyright Cengage Learning. Powered by Cognero.

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Chapter 12: Expansion Tanks POINTS: 1 REFERENCES: 650 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 9:51 PM DATE MODIFIED: 8/8/2022 9:52 PM 22. Expansion tanks have maximum pressure and temperature ratings. This information is stamped on the label of the tank. Typical ratings are 60 psi and______. a. 95 F b. 240 F c. 120 F d. 70 F ANSWER: b POINTS: 1 REFERENCES: 643 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 9:52 PM DATE MODIFIED: 8/8/2022 9:53 PM 23. A properly sized diaphragm-type expansion tank allows the pressure relief valve to reach a pressure of about 5 psi lower than its rated_________ when the system reaches its maximum operating temperature. a. head pressure b. total pressure c. operating pressure d. control pressure ANSWER: c POINTS: 1 REFERENCES: 640 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 9:54 PM DATE MODIFIED: 8/8/2022 9:57 PM 24. In a diaphragm-type expansion tank, as more fluid enters the tank, the diaphragm flexes, allowing the ________ to be compressed. a. electric-fill b. round-type c. fixed-orifice d. air volume ANSWER: d POINTS: 1 Copyright Cengage Learning. Powered by Cognero.

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Chapter 12: Expansion Tanks REFERENCES: 640 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 9:57 PM DATE MODIFIED: 8/8/2022 9:58 PM 25. When waterlogging occurs, there is no longer a cushion of___ for the system’s water to expand against. a. air b. stream c. bubbles d. pressures ANSWER: a POINTS: 1 REFERENCES: 637 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 9:59 PM DATE MODIFIED: 8/9/2022 1:15 AM 26. A software module called Expansion Tank Sizer in the Hydronics Design Studio software is an aid for determining______ and pressurization. a. tank mounting b. tank size c. tank draining d. tank filling ANSWER: b POINTS: 1 REFERENCES: 636 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 10:02 PM DATE MODIFIED: 8/8/2022 10:03 PM 27. In many systems, the make-up water system is fed into the piping connecting the_______ to the system. a. tank supports b. expansion tank c. tank fill valves d. tank’s water level indicator ANSWER: b POINTS: 1 REFERENCES: 651 QUESTION TYPE: Multiple Choice HAS VARIABLES: False Copyright Cengage Learning. Powered by Cognero.

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Chapter 12: Expansion Tanks DATE CREATED: 8/8/2022 10:03 PM DATE MODIFIED: 8/8/2022 10:04 PM 28. It is_________ to install two or more expansion tanks at different locations within a system. a. advisable b. not advisable c. correct d. proper ANSWER: b POINTS: 1 REFERENCES: 651 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 10:04 PM DATE MODIFIED: 8/8/2022 10:05 PM 29. In systems with______ resistance heat sources, it is also possible to locate the expansion tank near the inlet to the boiler. a. pressure b. fast flow c. correct d. low flow ANSWER: d POINTS: 1 REFERENCES: 649 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 10:05 PM DATE MODIFIED: 8/8/2022 10:06 PM 30. The expansion tank thus fixes the pressure of the system’s fluid at its point of attachment to the piping. This is called the_______________. a. point of no pressure change b. flash point c. low flow point d. co-factor point ANSWER: a POINTS: 1 REFERENCES: 647 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 10:07 PM DATE MODIFIED: 8/8/2022 10:07 PM Copyright Cengage Learning. Powered by Cognero.

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Chapter 12: Expansion Tanks

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Chapter 13: Air & Dirt Removal & Water Quality Adjustment 1. If properly designed, a closed-loop hydronic system should rid itself of most air within a few days of initial start-up. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 655 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 5:15 AM DATE MODIFIED: 8/8/2022 5:16 AM 2. The oxygen that causes corrosion is the same oxygen that forms water molecules. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 655 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 5:17 AM DATE MODIFIED: 8/8/2022 5:18 AM 3. Circulators transfer maximum head energy to incompressible fluids (e.g., liquids). A mixture of water and air is an example of an incompressible fluid. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 655 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 5:19 AM DATE MODIFIED: 8/8/2022 5:19 AM 4. Air has much lower specific heat and density than water. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 656 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 5:19 AM Copyright Cengage Learning. Powered by Cognero.

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Chapter 13: Air & Dirt Removal & Water Quality Adjustment DATE MODIFIED: 8/8/2022 5:20 AM 5. Circulators with internal spring-load check valves installed in vertical piping with upward flow are especially susceptible to air pockets. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 656 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 5:20 AM DATE MODIFIED: 8/8/2022 5:21 AM 6. Although water may appear perfectly clear and free of bubbles, it can still contain a significant quantity of air in solution. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 658 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 5:21 AM DATE MODIFIED: 8/8/2022 5:22 AM 7. A low-velocity-zone dirt separator has significantly less head loss and pressure drop in comparison to a basket strainer of equal pipe size, even when the latter has a clean screen. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 675 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 5:22 AM DATE MODIFIED: 8/8/2022 5:23 AM 8. Properly designed and installed hydronic systems will always require constant manual air venting. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 644 Copyright Cengage Learning. Powered by Cognero.

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Chapter 13: Air & Dirt Removal & Water Quality Adjustment QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 5:23 AM DATE MODIFIED: 8/8/2022 5:24 AM 9. Low system pressurization is usually caused by not setting the make-up water system properly. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 665 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 5:24 AM DATE MODIFIED: 8/8/2022 5:25 AM 10. Glycol-based antifreezes tend to leave a slippery film on components and tools that eventually turn sticky. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 671 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 5:26 AM DATE MODIFIED: 8/8/2022 5:26 AM 11. Flow noise is generated when dissolved gases are released from improperly deaerated fluid due to a(n) ____ in pressure. a. increase b. modulation c. equalization d. reduction ANSWER: d POINTS: 1 REFERENCES: 655 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 5:27 AM DATE MODIFIED: 8/8/2022 5:28 AM 12. Air contains oxygen, and oxygen in contact with ferrous metals creates ____. a. oxides Copyright Cengage Learning. Powered by Cognero.

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Chapter 13: Air & Dirt Removal & Water Quality Adjustment b. antigens c. bubbles d. deaeration ANSWER: a POINTS: 1 REFERENCES: 655 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 5:38 AM DATE MODIFIED: 8/8/2022 5:40 AM 13. A large pocket of air trapped within a system can totally stop flow. This effect is often called air ____. a. blockage b. plugging c. binding d. trapping ANSWER: c POINTS: 1 REFERENCES: 655 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 5:40 AM DATE MODIFIED: 8/8/2022 5:42 AM 14. Dissolved air can also lead to gaseous cavitation. Gaseous cavitation occurs when the pressure on the fluid ____ the saturation pressure of the dissolved gases it contains. a. equals b. drops below c. rises above d. is double ANSWER: b POINTS: 1 REFERENCES: 656 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 5:42 AM DATE MODIFIED: 8/8/2022 5:43 AM 15. When air exists as bubbles, a moving fluid may be able to carry them along through the system. This is called ____ air. a. entrained b. fluid c. deuterated Copyright Cengage Learning. Powered by Cognero.

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Chapter 13: Air & Dirt Removal & Water Quality Adjustment d. bubbly ANSWER: a POINTS: 1 REFERENCES: 657 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 5:43 AM DATE MODIFIED: 8/8/2022 5:46 AM 16. The air removal devices used in small hydronic systems can be classified as either high point vents or ____. a. “bleeders” b. central air separators c. “coin vents” d. deaerators ANSWER: b POINTS: 1 REFERENCES: 660-661 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 5:47 AM DATE MODIFIED: 8/8/2022 5:49 AM 17. The need for fully automatic (unattended) venting in locations not easily accessed requires a different type of device.

A(n) ____ air vent often provides the solution. a. electronic b. top-loaded c. ergonomic d. float-type ANSWER: d POINTS: 1 REFERENCES: 662 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 5:49 AM DATE MODIFIED: 8/8/2022 5:51 AM 18. A(n) ____ is capable of maintaining the system fluid in an unsaturated state of air solubility. This means that the water is always ready to absorb additional air from any areas of the system where it may be present. a. air purger b. coalescing media c. microbubble air separator d. hygroscopic air vent ANSWER: c Copyright Cengage Learning. Powered by Cognero.

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Chapter 13: Air & Dirt Removal & Water Quality Adjustment POINTS: 1 REFERENCES: 662-663 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 5:52 AM DATE MODIFIED: 8/8/2022 5:53 AM 19. A device that makes short work out of filling and purging residential and light commercial hydronic systems consists of a minimum 1-horsepower swimming pool pump mounted on a 30-gallon plastic trash barrel This device is called a(n) ____. a. circulator b. purge cart c. air scooper d. deaerator ANSWER: b POINTS: 1 REFERENCES: 668-669 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 5:54 AM DATE MODIFIED: 8/8/2022 5:55 AM 20. An automatic fluid feeder uses a small positive displacement pump operated by a pressure sensing switch to automatically pump fluid into the system when the pressure ____ a set minimum value. a. reaches b. drops below c. exceeds d. is stored at ANSWER: b POINTS: 1 REFERENCES: 673 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 5:55 AM DATE MODIFIED: 8/8/2022 5:57 AM 21. An____________ uses a small positive displacement pump operated by a pressure sensing switch to automatically pump fluid into the system when the pressure drops below a set minimum value. a. automatic flow valve b. automatic fluid feeder c. automatic fluid reducer d. automatic fluid exchange ANSWER: b Copyright Cengage Learning. Powered by Cognero.

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Chapter 13: Air & Dirt Removal & Water Quality Adjustment POINTS: 1 REFERENCES: 673 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 5:57 AM DATE MODIFIED: 8/8/2022 5:59 AM 22. A purge cart makes short work out of filling and purging___________________ hydronic systems using a minimum 1-horsepower swimming pool pump mounted on a 30-gallon plastic trash barrel. a. industry b. residential and light commercial c. home-based d. open-loop ANSWER: b POINTS: 1 REFERENCES: 668-669 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 5:59 AM DATE MODIFIED: 8/8/2022 6:01 AM 23. A(n) microbubble air separator can maintain the system fluid in a(n)______ state of air solubility. This means that the water is always ready to absorb additional air from any areas of the system where it may be present. a. saturated b. cooled c. unsaturated d. hygroscopic ANSWER: c POINTS: 1 REFERENCES: 662-663 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:01 AM DATE MODIFIED: 8/8/2022 6:02 AM 24. The need for fully_________ (unattended) venting in locations not easily accessed requires a different type of device.

A float-type air vent often provides the solution. a. electronic b. top-loaded c. ergonomic d. automatic ANSWER: d POINTS: 1 Copyright Cengage Learning. Powered by Cognero.

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Chapter 13: Air & Dirt Removal & Water Quality Adjustment REFERENCES: 662 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:03 AM DATE MODIFIED: 8/8/2022 6:04 AM 25. The_________ devices used in small hydronic systems can be classified as either high point vents or central air separators. a. bleeders b. air removal c. coin vent d. deaerator ANSWER: b POINTS: 1 REFERENCES: 660-661 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:04 AM DATE MODIFIED: 8/8/2022 6:06 AM 26. When air exists as bubbles, a moving fluid may be able to carry them along through the______. This is called entrainer air. a. system b. fluid c. piping d. circulators ANSWER: a POINTS: 1 REFERENCES: 657 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:06 AM DATE MODIFIED: 8/8/2022 6:07 AM 27. ___________ air can also lead to gaseous cavitation. Gaseous cavitation occurs when the pressure on the fluid drops below the saturation pressure of the dissolved gases it contains. a. Pressurized b. Dissolved c. Warm d. Cooled ANSWER: b POINTS: 1 REFERENCES: 656 Copyright Cengage Learning. Powered by Cognero.

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Chapter 13: Air & Dirt Removal & Water Quality Adjustment QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:07 AM DATE MODIFIED: 8/8/2022 6:09 AM 28. Progressive corrosion of______ metals such as steel or cast iron is another source of debris in hydronic system. a. non-ferrous b. ferrous c. alloy d. machined ANSWER: b POINTS: 1 REFERENCES: 674 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:09 AM DATE MODIFIED: 8/8/2022 6:10 AM 29. Specialized solutions that the author refers to as____________ are available that can break down the oil and grease films found in hydronic systems a. non-hydronic detergents b. hydronic detergents c. cleaning detergents d. chloride detergents ANSWER: b POINTS: 1 REFERENCES: 677 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:11 AM DATE MODIFIED: 8/8/2022 6:12 AM 30. The_____________ content of the water also plays a role in determining chemical reactions that might take place within the system. a. dissolved oxygen b. dissolved oils c. particle d. algae ANSWER: a POINTS: 1 REFERENCES: 679 QUESTION TYPE: Multiple Choice HAS VARIABLES: False Copyright Cengage Learning. Powered by Cognero.

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Chapter 13: Air & Dirt Removal & Water Quality Adjustment DATE CREATED: 8/8/2022 6:12 AM DATE MODIFIED: 8/8/2022 6:14 AM

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Chapter 14: Auxiliary Loads and Specialized Topics 1. Although space heating is the primary load, hydronic systems can also provide heat to other auxiliary loads. Examples include domestic water heating, garage heating, pool or spa heating, and snow melting. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 688 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 6:30 AM DATE MODIFIED: 8/8/2022 6:30 AM 2. Domestic hot water (DHW) is a common auxiliary load to be combined with hydronic space heating. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 709 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 6:42 AM DATE MODIFIED: 8/8/2022 6:43 AM 3. An indirect water heater is an insulated storage tank that produces its own heat, as does a typical direct-fired water heater. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 712 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 6:43 AM DATE MODIFIED: 8/8/2022 6:44 AM 4. For garage heating, radiant slab heating is the least efficient in situations where a relatively constant temperature will be maintained. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 724-725 QUESTION TYPE: True / False Copyright Cengage Learning. Powered by Cognero.

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Chapter 14: Auxiliary Loads and Specialized Topics HAS VARIABLES: False DATE CREATED: 8/8/2022 6:44 AM DATE MODIFIED: 8/8/2022 6:45 AM 5. The author's position is that antifreeze must be used in all hydronic garage heating applications. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 725 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 6:45 AM DATE MODIFIED: 8/8/2022 6:46 AM 6. The dominant heat loss from pools is caused by evaporation of water. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 727-728 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 6:46 AM DATE MODIFIED: 8/8/2022 6:47 AM 7. An advantage of snow and ice melting systems (also known as SIM systems) is the ability to use almost any fuel or heat source to provide the energy needed to operate the SIM system. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 730-731 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 6:47 AM DATE MODIFIED: 8/8/2022 6:48 AM 8. One way of initiating several short on/off cycles is by adding thermal mass to the distribution system using an insulated buffer tank. a. True b. False ANSWER: False Copyright Cengage Learning. Powered by Cognero.

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Chapter 14: Auxiliary Loads and Specialized Topics POINTS: 1 REFERENCES: 743 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 6:48 AM DATE MODIFIED: 8/8/2022 6:49 AM 9. Buffer tanks are always needed when the system contains several small individually controlled loads that have low thermal mass. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 743-744 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 6:49 AM DATE MODIFIED: 8/8/2022 6:50 AM 10. A minitube distribution system designed to take advantage of the large temperature difference available between hot boiler water and the relatively cool water returning from a heated slab-on-grade floor. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 749 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 6:50 AM DATE MODIFIED: 8/8/2022 6:51 AM 11. Many auxiliary loads require a transfer of heat from the hot water released by a boiler or other heat source to some other liquid operating at a lower temperature. Such situations require the use of a ____. a. counterflow b. heat exchanger c. hydraulic interface d. thermal plate ANSWER: b POINTS: 1 REFERENCES: 689 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:51 AM Copyright Cengage Learning. Powered by Cognero.

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Chapter 14: Auxiliary Loads and Specialized Topics DATE MODIFIED: 8/8/2022 6:52 AM 12. One method of providing domestic hot water using a boiler, which was widely used in older North American hydronic systems, was to insert a copper heat exchanger called a ____ into the upper portion of the boiler. a. flat plate b. plate and frame c. tankless coil d. coil and shell ANSWER: c POINTS: 1 REFERENCES: 710 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:52 AM DATE MODIFIED: 8/8/2022 6:54 AM 13. One benefit of an indirect water heater is that the stored water provides ____ that allows the boiler to operate for longer cycles, and thus at higher efficiencies. a. hydraulic pressure b. heat interface c. thermal circulation d. thermal mass ANSWER: d POINTS: 1 REFERENCES: 713 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:54 AM DATE MODIFIED: 8/8/2022 6:55 AM 14. As a rule, the piping and circulator, as well as the thermal rating of the tank’s heat exchanger should be able to ____ heat as fast as the boiler, or other heat source, can produce it. a. transfer b. exchange c. store d. distribute ANSWER: a POINTS: 1 REFERENCES: 690-691 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:55 AM DATE MODIFIED: 8/8/2022 6:57 AM Copyright Cengage Learning. Powered by Cognero.

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Chapter 14: Auxiliary Loads and Specialized Topics 15. Most manufacturers of indirect water heaters provide two types of rating information. One is called the first hour rating; the other is called the ____ rating. a. thermal mass b. hydraulic pressure c. head d. continuous flow ANSWER: d POINTS: 1 REFERENCES: 722 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:57 AM DATE MODIFIED: 8/8/2022 6:58 AM 16. A pool heat exchanger is piped into the system as a(n) ____ branch circuit. a. indirect b. parallel c. series d. hydraulic ANSWER: b POINTS: 1 REFERENCES: 727 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:58 AM DATE MODIFIED: 8/8/2022 7:00 AM 17. Hydronic snow and ice melting systems (also known as SIM systems) use ____ tubing embedded in pavements to melt snow and ice. a. copper b. stainless steel c. aluminum d. PEX or PEX-AL-PEX ANSWER: d POINTS: 1 REFERENCES: 730 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 7:41 AM DATE MODIFIED: 8/8/2022 7:42 AM 18. When low mass on/off heat sources are combined with extensively zoned distribution systems, it is possible for the heat source to ____ when only one or two zones operate.

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Chapter 14: Auxiliary Loads and Specialized Topics a. bind up b. not respond c. overcompensate d. short-cycle ANSWER: d POINTS: 1 REFERENCES: 743 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 7:42 AM DATE MODIFIED: 8/8/2022 7:44 AM 19. With a centralized hydronic heating system, cost allocation is handled by measuring the total thermal energy transferred to each space on a periodic (usually monthly) basis. This approach is called heat metering, or, more commonly in North America “____.” a. climate control b. BTU Metering c. shared metering d. central bookkeeping ANSWER: b POINTS: 1 REFERENCES: 754 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 7:44 AM DATE MODIFIED: 8/8/2022 7:46 AM 20. It is often necessary to adjust valves within each branch to achieve flow rates equal or close to those necessary for proper heat delivery. This process is called “____” the system. a. balancing b. regulating c. adjusting d. pressuring ANSWER: a POINTS: 1 REFERENCES: 763 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 8:00 AM DATE MODIFIED: 8/8/2022 8:01 AM 21. Hydronic snow and ice melting systems are also known as _________ systems. a. SIM Copyright Cengage Learning. Powered by Cognero.

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Chapter 14: Auxiliary Loads and Specialized Topics b. PEX-AL-PEX c. hydraulic interface d. PE-RT ANSWER: a POINTS: 1 REFERENCES: 730 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 8:01 AM DATE MODIFIED: 8/8/2022 8:03 AM 22. When a conventional boiler supplies heat to a SIM system, that boiler must be protected against sustained _________ condensation. a. counterflow b. heat c. hydraulic gas d. flue gas ANSWER: d POINTS: 1 REFERENCES: 737 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 8:04 AM DATE MODIFIED: 8/8/2022 8:05 AM 23. Frequent on/off cycling can be tolerated by electric resistance heating elements, but it is very undesirable for components such as gas valves, oil burners, ignition systems, and the compressors used in heat pumps. One way of achieving fewer but longer on/off cycles is by adding thermal mass to the distribution system using an insulated _________. a. buffer tank b. heat exchanger c. hydraulic interface d. thermal plate ANSWER: a POINTS: 1 REFERENCES: 743 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 8:05 AM DATE MODIFIED: 8/8/2022 8:06 AM 24. Many auxiliary loads require a transfer of heat from the hot water released by a boiler or other heat source to some other liquid operating at a lower temperature. Such situations require the use of a ____. a. counterflow Copyright Cengage Learning. Powered by Cognero.

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Chapter 14: Auxiliary Loads and Specialized Topics b. heat exchanger c. hydraulic interface d. thermal plate ANSWER: b POINTS: 1 REFERENCES: 746 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 8:06 AM DATE MODIFIED: 8/8/2022 8:07 AM 25. The required volume of a buffer tank depends on the rates of heat input and release, as well as the allowed temperature rise of the tank from when the heat source is turned on, to when it is turned off. The greater the tank’s volume, and the wider the operating temperature differential, the longer the heat source cycles will be. This process is __________. a. operating differential b. sizing a buffer tank c. pipe configuration d. thermal input ANSWER: b POINTS: 1 REFERENCES: 746 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 8:07 AM DATE MODIFIED: 8/8/2022 8:08 AM 26. Frequent on/off cycling can be tolerated by electric resistance heating elements, but it is very undesirable for components such as gas valves, oil burners, ignition systems, and the compressors used in_________. a. gas-fired boilers b. heat pumps c. pipe configurations d. pellet boilers ANSWER: b POINTS: 1 REFERENCES: 743 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 8:08 AM DATE MODIFIED: 8/8/2022 8:09 AM 27. The method for balancing systems that use differential pressure type balancing valves is called the _________. a. pipe configuration b. heat valve Copyright Cengage Learning. Powered by Cognero.

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Chapter 14: Auxiliary Loads and Specialized Topics c. pre-set method d. compensation method ANSWER: d POINTS: 1 REFERENCES: 771 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 8:10 AM DATE MODIFIED: 8/8/2022 8:10 AM 28. When planning a floor heating system for a large building, it is often necessary to locate manifold stations far from the mechanical room. These situations are well suited to _______ minitube distribution systems. a. counterflow b. heat exchanger c. multizone d. single zone ANSWER: c POINTS: 1 REFERENCES: 753 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 8:11 AM DATE MODIFIED: 8/8/2022 8:12 AM 29. Cost allocation is handled by measuring the total thermal energy transferred to each unit, and invoicing for that energy on a periodic basis. This approach is called ______. a. heat metering b. heat exchanger c. hydraulic interface d. thermal plate ANSWER: a POINTS: 1 REFERENCES: 754 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 8:12 AM DATE MODIFIED: 8/8/2022 8:13 AM 30. The most immediately noticed consequence of a poorly balanced hydronic system is the __________. a. fuel supply b. lack of comfort c. hydraulic leakage d. condensation Copyright Cengage Learning. Powered by Cognero.

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Chapter 14: Auxiliary Loads and Specialized Topics ANSWER: b POINTS: 1 REFERENCES: 763 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 8:13 AM DATE MODIFIED: 8/8/2022 8:14 AM

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Chapter 15: Fundamentals of Hydronic Cooling 1. Nearly all hydronic systems that have a heat pump as their heat source will have the ability to provide chilled-water cooling. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 780 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 5:57 AM DATE MODIFIED: 8/8/2022 5:58 AM 2. Chilled-water distribution systems can use significantly less electrical power compared to an equivalent forced-air distribution system. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 781 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 5:57 AM DATE MODIFIED: 8/8/2022 5:59 AM 3. A wide variety of currently available devices can be used to create warm-water for cooling buildings. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 782 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 5:57 AM DATE MODIFIED: 8/8/2022 6:01 AM 4. Specific thermodynamic index is called wet bulb temperature, which is the temperature above which the air being sampled cannot hold any additional water vapor. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 785 QUESTION TYPE: True / False Copyright Cengage Learning. Powered by Cognero.

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Chapter 15: Fundamentals of Hydronic Cooling HAS VARIABLES: False DATE CREATED: 8/8/2022 5:57 AM DATE MODIFIED: 8/8/2022 6:01 AM 5. Relative humidity is the ratio of the actual water mass in a given mass of air divided by the maximum mass of water the air could hold at its current temperature. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 787 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 5:57 AM DATE MODIFIED: 8/8/2022 6:02 AM 6. Another device that is similar to an air-to-water heat pump, but with extended capabilities, is called a heat recovery chiller. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 793 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 5:57 AM DATE MODIFIED: 8/8/2022 6:02 AM 7. There are several devices that can absorb heat from interior air and transfer that heat to a stream of chilled-water. They are often referred to as terminal units. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 800 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 5:57 AM DATE MODIFIED: 8/8/2022 6:03 AM 8. Designers planning to use air handlers or fan-coils in chilled-water cooling systems do not need to reference the total cooling capacity and sensible cooling capacity ratings of units under consideration. a. True b. False Copyright Cengage Learning. Powered by Cognero.

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Chapter 15: Fundamentals of Hydronic Cooling ANSWER: False POINTS: 1 REFERENCES: 804 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 5:57 AM DATE MODIFIED: 8/8/2022 6:04 AM 9. Elastomeric foam is never used as an insulation product that when installed causes piping to fail. a. True b. False ANSWER: False POINTS: 1 REFERENCES: 810 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 5:57 AM DATE MODIFIED: 8/8/2022 6:05 AM 10. A reverse indirect water heater serves as both a buffer tank and domestic water pre-heater. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 815 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 8/8/2022 5:57 AM DATE MODIFIED: 8/8/2022 6:05 AM 11. Traditional ducted________ cooling systems use blowers, and most deliver cooling through registers located on the floor. a. warmed-air b. forced-air c. pressurized-air d. saturated-air ANSWER: b POINTS: 1 REFERENCES: 782 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:06 AM DATE MODIFIED: 8/8/2022 6:10 AM Copyright Cengage Learning. Powered by Cognero.

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Chapter 15: Fundamentals of Hydronic Cooling 12. The heat rejected from a chiller or heat pump producing chilled-water may be of use for simultaneous_________ within the building. a. piping-loads b. vapor-pressure c. heating loads d. cooling loads ANSWER: c POINTS: 1 REFERENCES: 783 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:06 AM DATE MODIFIED: 8/8/2022 6:12 AM 13. Most cooling systems are designed to establish and maintain the temperature and___________ of interior air at some set combination of conditions deemed to provide human comfort. a. full humidity b. wet-bulb humidity c. basic humidity d. relative humidity ANSWER: d POINTS: 1 REFERENCES: 784 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:06 AM DATE MODIFIED: 8/8/2022 6:13 AM 14. ____________ is considered by most historians to be “the father of air conditioning.” In 1905, he developed the first psychrometric chart that quantified the properties of air. a. Willis Carrier b. Nokia Tesla c. Thomas Edison d. Alexander G. Bell ANSWER: a POINTS: 1 REFERENCES: 788 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:06 AM DATE MODIFIED: 8/8/2022 6:14 AM 15. Another performance index used to describe cooling performance of heat pumps is called the __________.

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Chapter 15: Fundamentals of Hydronic Cooling a. Pressure Efficiency Ratio b. Quantum Efficiency Ratio c. Constant Efficiency Ratio d. Energy Efficiency Ratio ANSWER: d POINTS: 1 REFERENCES: 792 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:06 AM DATE MODIFIED: 8/8/2022 6:15 AM 16. One of the most common terminal units is a(n)________. a. plenum box b. air handler c. vent grill cover d. blower motor ANSWER: b POINTS: 1 REFERENCES: 800 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:06 AM DATE MODIFIED: 8/8/2022 6:16 AM 17. It is also possible to produce chilled-water by combining an outdoor condenser unit with an external brazed plate refrigerant-to-water_________. a. duct system b. radiator c. air handler d. heat exchanger ANSWER: d POINTS: 1 REFERENCES: 794 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:07 AM DATE MODIFIED: 8/8/2022 6:17 AM 18. Airflow rate produced by the blower as a function of the external static pressure of the ducting system it supplies. This is typically stated in______________, versus the static pressure of the duct system. a. cubic meters minute (CMM) b. cubic meters second (CMS) Copyright Cengage Learning. Powered by Cognero.

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Chapter 15: Fundamentals of Hydronic Cooling c. cubic feet second (CFS) d. cubic feet minute (CFM) ANSWER: d POINTS: 1 REFERENCES: 802 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:07 AM DATE MODIFIED: 8/8/2022 6:18 AM 19. Cooling capacity increases as chilled-water temperature decreases, especially when the supplied chilled-water temperature is well below the______ of air entering the terminal unit. a. wet-point b. dewpoint c. night-time temperature d. vapor-pressure ANSWER: b POINTS: 1 REFERENCES: 805 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:07 AM DATE MODIFIED: 8/8/2022 6:20 AM 20. Chilled-water can also be passed through tubing circuits embedded in floors, walls, or ceilings. This approach is called______ cooling. a. radiant panel b. floor panel c. wall panel d. ceiling panel ANSWER: a POINTS: 1 REFERENCES: 806 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:07 AM DATE MODIFIED: 8/8/2022 6:21 AM 21. It is critically important that the chilled-water supplied for radiant panel cooling be at temperatures above the current _________ temperature of the room. a. indoor b. floor c. dewpoint Copyright Cengage Learning. Powered by Cognero.

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Chapter 15: Fundamentals of Hydronic Cooling d. ceiling ANSWER: c POINTS: 1 REFERENCES: 807 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:07 AM DATE MODIFIED: 8/8/2022 6:21 AM 22. The chilled-water supplied to radiant cooling panels should be a minimum of _________ above the current dewpoint temperature of the room. a. 3 °F b. 2 °F c. 5 °F d. 4 °F ANSWER: a POINTS: 1 REFERENCES: 806 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:07 AM DATE MODIFIED: 8/8/2022 6:23 AM 23. One approach for keeping radiant cooling panels above the dewpoint is to use a 3-way motorized mixing valve operated by a___________. a. radiant panel b. switch controller c. constraint controller d. dewpoint controller ANSWER: d POINTS: 1 REFERENCES: 807 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:07 AM DATE MODIFIED: 8/8/2022 6:24 AM 24. ___________ is one commonly used insulation product that, when properly installed, provides both a thermal barrier and a vapor barrier. This material is manufactured by extruding a mixture of specific rubber compounds, PVC, and a nonCFC/HCFC foaming agent. a. Elastomeric foam b. Elastic foam c. Electromatic foam Copyright Cengage Learning. Powered by Cognero.

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Chapter 15: Fundamentals of Hydronic Cooling d. Hydrofoam ANSWER: a POINTS: 1 REFERENCES: 806 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:07 AM DATE MODIFIED: 8/8/2022 6:25 AM 25. Modern hydronics technology makes it easy to create multi-zone distribution systems. This is true for both heating and cooling. However, adding zones increases the cost and complexity of any hydronic system. This is especially true with zoned hydronic cooling because it typically requires a __________ terminal unit in each zone. a. radiant b. hot-water c. wall panel d. chilled-water ANSWER: d POINTS: 1 REFERENCES: 814 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:07 AM DATE MODIFIED: 8/8/2022 6:26 AM 26. ____________ are ideal for absorbing heat from the occupied space below. a. Radiant panels b. Floor panels c. Radiant ceilings d. Ceiling panels ANSWER: c POINTS: 1 REFERENCES: 807 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:07 AM DATE MODIFIED: 8/8/2022 6:27 AM 27. Because radiant panels can only provide sensible cooling, systems using them need to provide a means of latent cooling. Failure to do so will result in cooler air, but at a very high humidity level that will not be comfortable. One approach that combines radiant panels for sensible cooling with a central air handler for latent cooling is a variable-speed circulator that responds to an input signal from a ____________ controller. a. multi-zoned b. single zone c. latent heat Copyright Cengage Learning. Powered by Cognero.

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Chapter 15: Fundamentals of Hydronic Cooling d. relative humidity ANSWER: a POINTS: 1 REFERENCES: 808 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:08 AM DATE MODIFIED: 8/8/2022 6:28 AM 28. A product that is well suited to smaller chilled-water cooling systems is ________ tubing. It is available in coils up to 100 feet long, and in nominal pipe sizes of 1/2 inch to 2 inches. a. panel b. air pocket c. pre-insulated PEX d. foam ANSWER: c POINTS: 1 REFERENCES: 812 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:08 AM DATE MODIFIED: 8/8/2022 6:29 AM 29. A _________ water heater serves as both a buffer tank and domestic water pre-heater. The target water temperature in the tank is regulated by an outdoor reset controller. a. reverse direct b. forward indirect c. reverse indirect d. forward direct ANSWER: c POINTS: 1 REFERENCES: 815 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:08 AM DATE MODIFIED: 8/8/2022 6:30 AM 30. Forward thinking hydronic heating professionals should add hydronic ________ to the portfolio of services they offer. a. radiant heating b. cooling c. insulation d. fiberglass ANSWER: b Copyright Cengage Learning. Powered by Cognero.

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Chapter 15: Fundamentals of Hydronic Cooling POINTS: 1 REFERENCES: 821 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 8/8/2022 6:08 AM DATE MODIFIED: 8/8/2022 6:31 AM

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