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

To control fuel pressure

Answer

To regulate engine coolant flow

Answer

To adjust ignition timing

Question 2

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

Accepted Answer

Disc brake

Answer

Drum brake

Answer

Band brake

Answer

Shoe brake

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

Converts AC current to DC to start the engine

Answer

Regulates fuel injection timing

Answer

Controls transmission shifting

Question 4

What is 'engine displacement'?

Accepted Answer

The total volume swept by all pistons in one complete revolution

Answer

The weight of the engine block

Answer

The distance the crankshaft travels

Answer

The fuel capacity of the engine

Question 5

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

Accepted Answer

Torque converter

Answer

Clutch pack

Answer

Planetary gearset

Answer

Valve body

Question 6

What is the function of the vehicle's EGR (Exhaust Gas Recirculation) system?

Accepted Answer

To recirculate a portion of exhaust gases back into the intake to reduce NOx emissions

Answer

To improve exhaust sound

Answer

To increase exhaust flow for better performance

Answer

To filter particulates from exhaust

Question 7

When a car's wheel is out of balance, what is the most common symptom?

Accepted Answer

Vibration felt in the steering wheel or seat at highway speeds

Answer

Engine misfire at idle

Answer

Difficulty shifting gears

Answer

Poor fuel economy at low speeds