FREE AFCT Auto and Shop Information: Automotive Systems Questions and Answers

Question 1

What is the primary function of an engine's radiator?

Accepted Answer

To cool the engine coolant

Answer

The radiator is a heat exchanger and a key component of the engine's cooling system. Hot coolant from the engine passes through the radiator, where airflow dissipates the heat, before the cooled fluid is circulated back to the engine to absorb more heat.

Question 2

In a four-stroke internal combustion engine, which stroke follows the compression stroke?

Accepted Answer

Power

Answer

The four strokes occur in a specific order: Intake, Compression, Power, and Exhaust. After the fuel-air mixture is compressed by the piston (Compression stroke), the spark plug ignites it, forcing the piston down and generating power (Power stroke).

Question 3

What component recharges the battery and powers the electrical system while the engine is running?

Accepted Answer

Alternator

Answer

The alternator is driven by a belt connected to the engine's crankshaft. It generates alternating current (AC), which is then converted to direct current (DC) to power the vehicle's electrical accessories and recharge the battery.

Question 4

Which of these is NOT a primary function of engine oil?

Accepted Answer

Combustion

Answer

Engine oil has several key functions: lubrication to reduce friction, cooling by carrying heat away, and cleaning by suspending dirt particles. However, it does not play a direct role in the combustion process of the fuel-air mixture.

Question 5

The master cylinder, calipers, and pads are all components of which system?

Accepted Answer

The braking system

Answer

These are all essential parts of a hydraulic disc brake system. The master cylinder creates hydraulic pressure when the brake pedal is pressed, which is transmitted through brake lines to the calipers. The calipers then squeeze the brake pads against the rotors to slow the vehicle.

(AFCT) Armed Forces Classification Test Practice Test

(AFCT) Armed Forces Classification Test Practice Test

FREE AFCT Auto and Shop Information: Automotive Systems Questions and Answers