ASVAB Study GuideAuto & Shop Information Practice Test 2
Tap an answer to check it instantly and read the explanation. 10 questions: 3 easy, 4 medium and 3 hard.
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Question 1 easy
In which primary engine structure are the pistons and cylinder bore contained?
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Correct answer: B — engine block
The engine block (or cylinder block) forms the main foundation of the engine, housing the cylinders inside which the pistons slide up and down.
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Question 2 easy
What primary function does pressing the brake pedal perform in a vehicle?
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Correct answer: D — all of the above
Depressing the brake pedal creates hydraulic fluid pressure that forces friction pads against the turning rotors, successfully slowing down or stopping the vehicle.
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Question 3 easy
What primary feature does a power steering system provide to the driver?
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Correct answer: A — reduces the effort needed to turn the steering wheel
Power steering uses hydraulic or electric assistance to significantly reduce the physical effort required by the driver to turn the vehicle's wheels.
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Question 4 medium
What component transfers rotational torque from the transmission/differential directly to the driven wheels?
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Correct answer: A — axle shaft
An axle shaft is the rotating rod that transmits engine driving torque from the final drive or differential directly to the wheel hub.
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Question 5 medium
What is the most likely symptom if a spark plug's gap is set too narrow?
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Correct answer: C — the spark may be too weak to ignite the air-fuel mixture properly
If a spark plug gap is adjusted too narrow, the resulting electrical arc is too small and cool, leading to incomplete combustion or engine misfires.
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Question 6 medium
In a liquid cooling system, what component regulates engine temperature by controlling coolant flow to the radiator?
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Correct answer: C — thermostat
The thermostat acts as a temperature-sensitive valve that opens or closes to control the flow of coolant into the radiator, maintaining proper engine operating temperature.
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Question 7 medium
An alternator performs the primary electrical generation function previously handled by a/an
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Correct answer: A — generator (or DC generator)
Before modern alternating current (AC) alternators were widely adopted, older vehicles used direct current (DC) generators to recharge the battery and power electrical equipment.
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Question 8 hard
What is the primary function of an exhaust manifold in an internal combustion engine?
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Correct answer: B — to collect exhaust gases from multiple cylinders into a single pipe
The exhaust manifold attaches directly to the engine cylinder head and collects hot exhaust gases from all engine cylinders, directing them safely into a single exhaust pipe.
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Question 9 hard
Which drivetrain component allows the outer drive wheel to rotate faster than the inner drive wheel during a turn?
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Correct answer: D — differential
The differential uses a set of gears to split engine torque between left and right driven wheels, enabling them to rotate at different speeds when cornering.
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Question 10 hard
What primary environmental hazard does an EVAP (Evaporative Emission Control) system prevent?
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Correct answer: B — gasoline vapor fumes from escaping directly into the atmosphere
The EVAP system captures fuel vapors evaporated from the gas tank and stores them in a charcoal canister until they can be burned safely inside the engine.