ASVAB Automotive Information 2

Question 1

What is the purpose of a vehicle's PCV (Positive Crankcase Ventilation) valve?

Accepted Answer

To vent blow-by gases from the crankcase back into the intake

Answer

The PCV valve routes harmful blow-by gases from the crankcase back into the intake manifold to be burned rather than released into the atmosphere.

Question 2

Which type of brake uses hydraulic pressure to squeeze brake pads against a rotor?

Accepted Answer

Disc brake

Answer

Disc brakes use a hydraulic caliper to squeeze brake pads against a spinning rotor, creating friction to slow the vehicle.

Question 3

What does a vehicle's alternator do while the engine is running?

Accepted Answer

Generates AC current converted to DC to charge the battery and power electronics

Answer

The alternator generates alternating current (AC) which is converted to direct current (DC) to recharge the battery and supply power to the vehicle's electrical systems.

Question 4

What is 'engine displacement'?

Accepted Answer

The total volume swept by all pistons in one complete revolution

Answer

Engine displacement is the total volume swept by all pistons during one complete cycle, typically measured in liters or cubic inches.

Question 5

Which component in an automatic transmission uses fluid coupling to transmit power from the engine?

Accepted Answer

Torque converter

Answer

The torque converter uses fluid coupling to transmit engine power to the transmission, allowing the vehicle to stop without stalling the engine.

ASVAB - Armed Services Vocational Aptitude Battery Practice Test

ASVAB - Armed Services Vocational Aptitude Battery Practice Test

ASVAB Automotive Information 2