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AUTOMOTIVE INFORMATION ASVAB EXAM QUESTIONS
Actual Qs and Ans - Expert-Verified Explanation -Guaranteed passing score -48 Questions and Answers
-Format: Multiple-choice / Flashcard
Question 1: Piston rings
Answer:
Seal the piston to the cylinder and prevent combustion gases from leaking past. Oil rings prevent oil from the engine crankcase from making its way into the combustion chamber
Question 2: Emission control system
Answer:
Helps limit toxic vehicle emissions
Question 3: Cylinder head
Answer:
Located above the piston, it houses the combustion chamber, the intake and exhaust valves, and the intake and exhaust ports
Question 4: Combustion
Answer:
Rapid burning of an air fuel mix
Question 5: Drive train
Answer:
Transmits power from the engine to the vehicles drive wheels
Question 6: Water cooling
Answer:
Type of cooling system. Uses a liquid coolant to pick up excess heat and then rejects that heat through a radiator
Question 7: Camshaft location
Answer:
Another way to classify automotive engines.
Question 8: V-type engine
Answer:
Cylinder design that is the most popular. This improves aerodynamic flow outside the vehicle bc the front of the vehicle can be lower due to smaller engine.
Question 9: Firing order
Answer:
Order in which cylinders fire. Common one is 1342
Question 10: Air cooling
Answer:
Type of cooling system. Air is circulated over cooling find on the outside of the engine to remove excess heat
Question 11: Combustion chamber
Answer:
Located in the cylinder head directly above the piston, it is where the actual combustion of the air-fuel mixture takes place
Question 12: Electrical system
Answer:
Includes starting charging and lighting and accessory systems
Question 13: Cooling system
Answer:
Removes excess heat from engine
Question 14: Intake valve
Answer:
Allows air fuel mixture to be drawn into the combustion chamber. When closed, it must deal the combustion chamber from the intake port
Question 15: Inline design
Answer:
Simplest cylinder arrangement. Cylinders are lined up in a row.
Question 16: Cylinder
Answer:
Forms a guide for the piston to move in. Allows the piston to move up and down as the engine completes its cycle
Question 17: Exhaust stroke
Answer:
Just before BDC, the exhaust valve starts to open and the engine begins its fourth and final stroke.Gases are now spent and must be purged from the engine.
Question 18: Camshaft
Answer:
Responsible for the opening and closing of the engines intake and exhaust valve. Turns at one half the speed of the crankshaft
Question 19: Exhaust system
Answer:
Forms a pipeline for waste gases to be removed from the engine and then dissipated to the open atmosphere
Question 20: Fuel system
Answer:
Ensures that correct amounts of air and fuel are available for efficient combustion in the engine
Question 21: Intake stroke
Answer:
Piston is at TDC and the intake valve is beginning to open. When piston reaches BDC the intake valve is almost closed
Question 22: Advancing the timing
Answer:
Spark is adjusted to take place before the combustion cycle. (After for retarding the timing)
Question 23: Lubrication system
Answer:
Circulates motor oil through the engine to reduce friction and make the engine run smoothly
Question 24: Lean mix
Answer:
Too much air and not enough fuel. Burn slowly and hotter. Example- 17:1
Question 25: Flat design
Answer:
Cylinder arrangement where the cylinders are on a horizontal plane and half and half facing away from each other with the crankshaft between them.
Question 26: Detonation
Answer:
When air fuel mix explodes rather than burns. Often takes place when an engines air fuel mix is lean
Question 27: Exhaust valve
Answer:
Allows waste gases to be removed from the combustion chamber. When closed, it must deal the combustion chamber from exhaust port
Question 28: Piston
Answer:
Cylindrically shaped object with a solid crown on top that moves up and down in the engines cylinders.Hot gases from the combustion of the air-fuel mixture push on the piston to do the actual work
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