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Test Bank For Automotive Engines Diagnosis, Repair, and Rebuilding 9th Edition Tim Gilles, Tim LeVan Chapter 1-19 Chapter 01: Engine Operation 1. The I-head engine has the valves in the block. a. True b. False ANSWER: False FEEDBACK: Correct Incorrect The I-Head engine has the valves located in the cylinder head
POINTS: 1 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 1/16/2023 8:41 AM DATE MODIFIED: 1/16/2023 8:45 AM 2. The gasoline engine is also known as a spark ignition engine. a. True b. False ANSWER: True FEEDBACK: Correct The gasoline engine requires a spark plug to ignition the air fuel mixture Incorrect
POINTS: 1 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 1/16/2023 8:48 AM DATE MODIFIED: 1/27/2023 6:47 AM 3. A two-stroke engine has a power stroke every other crankshaft revolution. a. True b. False ANSWER: False FEEDBACK: Correct Incorrect A two-stroke engine has a power stroke every crankshaft revolution
POINTS: 1 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 1/16/2023 8:52 AM DATE MODIFIED: 2/22/2023 1:14 AM 4. In four-stroke engine operation, gasoline will not burn unless it is mixed with the correct amount of air. a. True Copyright Cengage Learning. Powered by Cognero.
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True Correct
The four-stroke engine requires the air fuel mixture to be 14.7:1 for a proper combustion event.
Incorrect
POINTS: 1 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 1/16/2023 8:59 AM DATE MODIFIED: 1/16/2023 9:15 AM 5. The camshaft controls the rate at which the engine breathes. a. True b. False ANSWER: True FEEDBACK: Correct The camshaft controls the valve opening events which allows the engine to breath properly Incorrect
POINTS: 1 QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 1/16/2023 9:11 AM DATE MODIFIED: 1/16/2023 9:17 AM 6. What cylinder arrangement is popular with designers when an engine has more than four cylinders? a. radial b. opposed c. in-line d. V-type ANSWER: d FEEDBACK: a. b. c. d. Engines with more than 4 cylinders, designers prefer the V design to minimize the physical space the engine requires underneath the hood of the vehicle.
POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 1/22/2023 7:42 PM DATE MODIFIED: 1/27/2023 6:38 AM 7. How many degrees is a complete cycle on a four-stroke engine? a. 120 b. 180 c. 360 Copyright Cengage Learning. Powered by Cognero.
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d. 720 ANSWER: FEEDBACK:
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d a. b. c. d. The four-stroke cycle takes two revolutions of the crankshaft to complete. Each revolution is 360 degrees, so multiply that by 2 you get 720 degrees of rotation
POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 1/22/2023 7:43 PM DATE MODIFIED: 2/22/2023 1:52 AM 8. What cylinder number is the closest to the front of the engine on almost all V-type engines? a. 1 b. 2 c. 4 d. 6 ANSWER: a FEEDBACK: a. The #1 cylinder is the farthest forward cylinder of the engine and is a common rule used by all OEM’s
b. c. d. POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 1/22/2023 7:44 PM DATE MODIFIED: 1/27/2023 6:40 AM 9. What proportion of gross horsepower is consumed by all of the accessories on a modern engine? a. 10% b. 25% c. 30% d. 50% ANSWER: b FEEDBACK: a. b. The use of belt or gear driven accessories consumes 25% of the gross horsepower of the engine and is one of the main reasons most OEM’s are moving to electrically powered accessories.
c. d. POINTS: 1 QUESTION TYPE: Multiple Choice Copyright Cengage Learning. Powered by Cognero.
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HAS VARIABLES: False DATE CREATED: 1/22/2023 7:45 PM DATE MODIFIED: 1/27/2023 6:49 AM 10. How often does a power stroke occur on a V8 engine? a. Every 90 degrees b. Every 360 degrees c. Every 120 degrees d. Every 720 degrees ANSWER: a FEEDBACK: a. With a V8 configured engine every 90 degrees one cylinder is on the power stroke. This allows for the engine to maintain its momentum as it is operated over the operational range. b. c. d. POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 1/22/2023 7:46 PM DATE MODIFIED: 2/21/2023 5:18 AM 11. Most of today’s cars are powered by _____. a. Rudolph-cycle engines b. Otto-cycle engines c. Ford-cycle engines d. Hemi-cycle engines ANSWER: b FEEDBACK: a. b. The Otto-cycle engine has the largest range of operational RPM and allows the operator with the most versatile type of engine. c. d. POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 1/22/2023 7:47 PM DATE MODIFIED: 1/27/2023 6:49 AM 12. What is true of the I-head engine? Technician A says that the I-head engine is widely used in automobiles because it can breathe better than earlier engine designs. Technician B says that increased valve lift is possible with an I-head engine. Which technician is correct? a. It is not widely used in automobiles. b. It does not allow for increased valve lift. c. It does not breathe as well as earlier engine designs. Copyright Cengage Learning. Powered by Cognero.
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d. It breathes better than earlier engine designs. ANSWER: d FEEDBACK: a. b. c. d. The I-head designed engine allows for easier intake and exhaust flow throughout the engine. This increases power and decreases the need for airflow to change direction. POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 1/22/2023 7:48 PM DATE MODIFIED: 1/27/2023 6:50 AM 13. How many strokes per cycle do most automotive gasoline engines have? a. 2 b. 6 c. 4 d. 8 ANSWER: c FEEDBACK: a. b. c. 4 - The intake, compression, power and exhaust stroke is the Otto four-stroke cycle d. POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 1/22/2023 7:49 PM DATE MODIFIED: 2/21/2023 5:19 AM 14. The term ―blowby‖ refers to gases escaping past the ____. a. rings b. crankshaft c. flywheel d. flywheel ANSWER: a FEEDBACK: a. Blowby is a situation where compression escapes the combustion chamber between the piston rings and the cylinder wall. b. c. d. POINTS: QUESTION TYPE: HAS VARIABLES: DATE CREATED:
1 Multiple Choice False 1/22/2023 7:50 PM
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