COURSE DESCRIPTION
Welcome to our ASVAB Practice Questions!
The Armed Services Vocational Aptitude Battery (ASVAB) is a multiple choice test, administered by the United States Military Entrance Processing Command, used to determine qualification for enlistment in the United States Armed Forces. It is often offered to American high school students when they are in the 10th, 11th and 12th grade, though anyone eligible for enlistment may take it.
Our tests consistent of all major components required to successfully pass the ASVAB examination. Go through our ASVAB practice test to prepare yourself for the final examination.
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Question 1 of 30
1. Question
What is the correct air-fuel ratio for normal gasoline engine operation?
Correct
Incorrect
It takes about 15 pounds of air to completely burn 1 pound of gasoline so the air-fuel ratio for normal gasoline engine operation is 15: 1.
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Question 2 of 30
2. Question
Valve lifters are between _______________ and _______________?
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Valve lifters run on the camshaft and are made to move vertically by the action of the rotating cam. Valve lifters connect to pushrods that connect to rockers which reverse the direction of the lifter movement to press the valves downwards to open them.
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Question 3 of 30
3. Question
Another name for a reciprocating engine is a:
Correct
Incorrect
A reciprocating engine is an engine whose crankshaft is turned by pistons moving up and down in a cylinder.
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Question 4 of 30
4. Question
Which of the following is in the correct order of cycling sequence for a four-stroke engine?
Correct
Incorrect
The correct order of cycling sequence for a four-stroke engine is: Intake stroke, Compression stroke, Power stroke, Exhaust stroke which makes Intake stroke, Compression stroke, Exhaust stroke the correct answer.
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Question 5 of 30
5. Question
What is the function of the flywheel?
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Incorrect
The four-stroke cycle produces pulses that can cause vibrations in the crankshaft. The flywheel reduces pulsating from the crankshaft.
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Question 6 of 30
6. Question
Which of the following is not a component in the engine lubrication system?
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In engine lubrication, oil remains in the oil pan until the engine is turned on. It then gets sucked up the pickup tube by the oil pump and pressurized. This pressure is moderated by the pressure relief valve and the oil is fed through the oil filter into the engine to lubricate it.
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Question 7 of 30
7. Question
Aluminum parts should be cleaned in a:
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Aluminum parts should be cleaned in a cold tank because a hot tank destroys nonferrous metals like aluminum.
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Question 8 of 30
8. Question
Which of the following is not a common engine cylinder arrangement?
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Incorrect
Four common cylinder arrangements are in-line, V, opposed, and radial.
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Question 9 of 30
9. Question
What does the timing belt do?
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The timing belt synchronizes the camshaft and the crankshaft. Maintaining proper synchronization between the rotation of the camshaft and the rotation of the crankshaft is critical to ensure that the engine’s valves open and close at the proper times during each cylinder’s intake and exhaust strokes.
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Question 10 of 30
10. Question
For in-line cylinder arrangements in an engine, how are the cylinders numbered?
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In-line cylinder arrangements number cylinders sequentially (1, 2, 3, …) front to rear.
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Question 11 of 30
11. Question
Which of the following is not a common engine cylinder arrangement?
Correct
Incorrect
Four common cylinder arrangements are in-line, V, opposed, and radial.
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Question 12 of 30
12. Question
What is the function of the solenoid?
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The solenoid controls the circuit between the battery and the starter motor. When a car’s ignition switch is activated the starter solenoid receives the electric signal from the ignition which causes it to close a pair of heavy contacts enabling the flow of electric current from the battery to the starter motor.
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Question 13 of 30
13. Question
What automotive system turns engine energy into motive force?
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The drive train is the system that connects the transmission with the driving axles of an automobile.
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Question 14 of 30
14. Question
What is the function of the distributor?
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Incorrect
The distributor delivers voltage from the ignition coil to the cylinders. The distributor is responsible for helping the coil develop high voltage and then getting that high voltage to the cylinder combustion chambers via the spark plugs at the correct time to properly ignite the air-fuel mixture.
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Question 15 of 30
15. Question
What is the function of the flywheel?
Correct
Incorrect
The four-stroke cycle produces pulses that can cause vibrations in the crankshaft. The flywheel reduces pulsating from the crankshaft.
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Question 16 of 30
16. Question
The ignition coil is a/ an:
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Incorrect
The ignition coil steps up the 12 volts available from the battery or alternator to a voltage of 30,000 or more volts at the spark plug. Converting a lower voltage input into a higher voltage output makes the ignition coil a step-up transformer.
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Question 17 of 30
17. Question
What is the function of the cylinder head?
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The cylinder head closes the top of the cylinder forming the combustion chamber. It sits just above the cylinders on top of the cylinder block forming a joint that’s sealed by the head gasket.
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Question 18 of 30
18. Question
What is the correct air-fuel ratio for normal gasoline engine operation?
Correct
Incorrect
It takes about 15 pounds of air to completely burn 1 pound of gasoline so the air-fuel ratio for normal gasoline engine operation is 15: 1.
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Question 19 of 30
19. Question
Which of the following is in the correct order of cycling sequence for a four-stroke engine?
Correct
Incorrect
The correct order of cycling sequence for a four-stroke engine is: Intake stroke, Compression stroke, Power stroke, Exhaust stroke which makes Compression stroke, Power stroke, Exhaust stroke the correct answer.
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Question 20 of 30
20. Question
What is the function of the slip joint?
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The slip joint allows the transmission to deliver power over rough terrain. Because the rear axle moves up and down on the suspension when the vehicle is traversing rough terrain, the distance between the transmission and the rear axle frequently changes. For this reason the drive shaft is not anchored to the rear axle and a slip joint is used between them. The slip joint moves in and out on the transmission shaft to allow for change of distance between the transmission and rear axle over rough terrain.
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Question 21 of 30
21. Question
Which of these collects burned gases from the engine?
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The exhaust system of an automobile consists of an exhaust manifold that attaches to the cylinder head and collects burned gases from the engine, a catalytic converter that converts pollutants in the gases into less harmful emissions, a muffler that quiets the noise resulting from engine exhaust, and an exhaust pipe that links system components together.
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Question 22 of 30
22. Question
What is the function of a distributor?
Correct
Incorrect
The distributor delivers voltage from the ignition coil to the cylinders. The distributor is responsible for helping the coil develop high voltage and then getting that high voltage to the cylinder combustion chambers via the spark plugs at the correct time to properly ignite the air-fuel mixture.
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Question 23 of 30
23. Question
What type of energy does an automotive battery produce?
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Incorrect
An automotive battery produces direct current for use by automotive systems.
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Question 24 of 30
24. Question
What is the function of the head gasket?
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A head gasket is a gasket that sits between the engine block and cylinder heads to seal the cylinders to ensure maximum compression and avoid leakage of coolant or engine oil into the cylinders.
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Question 25 of 30
25. Question
Another name for a reciprocating engine is a:
Correct
Incorrect
A reciprocating engine is an engine whose crankshaft is turned by pistons moving up and down in a cylinder.
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Question 26 of 30
26. Question
Which of the following statements about fuel injection is false?
Correct
Incorrect
Fuel injection has replaced the carburetor as the primary automobile fuel delivery system. The main difference between the fuel injector and the carburetor is that fuel injection atomizes the fuel by forcibly pumping it through a small nozzle under high pressure while a carburetor relies on suction to draw fuel into an accelerated intake air stream.
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Question 27 of 30
27. Question
Which of the following is not a characteristic of a four-stroke engine?
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Incorrect
Engine cycling is the number of strokes that an engine makes to generate power. The characteristics of a two-stroke engine include: fire once every revolution, used in small engines, does not have valves, combine the intake and compression strokes, combine the combustion and exhaust strokes. The characteristics of a four-stroke engine include: fire once every other revolution, used in larger engines, have separate strokes for intake and compression, have separate strokes for combustion and exhaust.
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Question 28 of 30
28. Question
Which of the following statements about the differential is not true?
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Question 29 of 30
29. Question
An overcooled engine:
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Incorrect
An overcooled engine is less efficient. During the power stroke, combustion heat pushes down the piston. If too much of this heat is lost to the cooling system, the fuel might not combust completely and contaminate the engine’s lubricating oil diminishing its lubricating ability. Incomplete combustion of fuel also negatively affects the engine’s fuel efficiency and power output.
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Question 30 of 30
30. Question
The firing order of the cylinders in an engine can be found by:
Correct
Incorrect
The firing order of the cylinders in an engine is different than the cylinder numbers and can be found by observing the order in which the intake valves open.
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