Air Brake Practice Test 01

Taking the free Air Brake Practice Test is an essential step towards passing your official exam with flying colors. This test is designed to assess your knowledge of air brake systems and ensure that you are well-prepared for the actual exam.

1 / 30

What is another word for the air that is squeezed into a smaller space?

Prepressed

Bi-pressed

Suppressed

Compressed

2 / 30

When enough friction is created between the brake lining and the drums, what happens?

The vehicle stops quickly

The wheels stop turning

The brakes work as expected

None of these

3 / 30

In vehicles where the compressor is driven by belts, they should be checked for what?

Size

Missing

Cracks and tension

Teeth

4 / 30

What happens if one or two of the wheels had brakes that were not properly adjusted?

Nothing different would happen

The other wheels would have to do more than their share of the braking

The brakes would lock

The vehicle would stop quicker

5 / 30

The friction between brake drums and linings generates what?

Traction

Noise

Nothing

Heat

6 / 30

Which statement is false? A basic air brake system capable of stopping a vehicle has main components, including...

A compressor to pump air with a governor to control it

Fans

A reservoir or tank to store the compressed air

A foot valve to regulate the flow of compressed air from the reservoir when it is needed for braking

7 / 30

Most brake linings operate best at around what temperature?

150°C

350°C

290°C

250°C

8 / 30

At what maximum psi is it not necessary for the compressor to pump air?

100 psi

120 psi

135 psi

110 psi

9 / 30

Too much heat in the brakes could result in what?

None of these

Quicker stops

Wheel lock-up

Brake damage and possible failure

10 / 30

The time it takes from the momenta hazard is recognized to the time the brake is applied is approximately how much?

1/2 of a second

1/4 of a second

3/4 of a second

1/8 of a second

11 / 30

Where does the heat that the brakes generates go to?

The atmosphere

The pads

The brake lines

The tires

12 / 30

Which statement is false? Stopping distance consists of..,

Size of brake drums

Driver's reaction time

Braking distance

Brake lag

13 / 30

What can be used to gain a mechanical advantage?

Air pressure

Good tire tread

Thick brake drums

A solid brake pad

14 / 30

The heat produced is absorbed by what?

The brake lines

The tires

The wheel hubs

The metal brake drums

15 / 30

What is referred to as brake lag?

The time it take the brakes to stop the vehicle once the brakes have been applied

The time it takes the air to travel through a properly maintained air brake system

The time it takes a driver to move their foot from the accelerator to the brake pedal

The time it takes the brakes to cool down after an application

16 / 30

A compressor is designed to pump air into what?

Safety valve

Quick release valve

Reservoir

Brake chambers

17 / 30

What is the source of compressed air called?

Distributor

Generator

Compressor

Governor

18 / 30

What is meant by the unloading stage?

When the air is being pushed through the air hoses

When the system pressure reaches its maximum

When the air is being discharged from the brakes

When the system pressure reaches its minimum

19 / 30

If the weight is doubled, the braking force must be what to be able to stop in the same distance?

The same

Tripled

Doubled

Quadrupled

20 / 30

What controls the minimum and maximum air pressure in the system by controlling when the compressor pumps air?

One-way check valve

A governor

Primary reservoir

A senator

21 / 30

If the vehicle had six wheels, each wheel would have to provide how much of the braking force?

1/6

2/3

2/6

1/12

22 / 30

Most brake linings should not exceed what temperature?

375°C

400°C

325°C

425°C

23 / 30

The compressor is driven by what?

Air flow

The vehicle's engine

A small motor

A generator

24 / 30

When weight and speed are both doubled, the braking force must what in order be to be able to stop in the same distance?

Increased by six times

Increased by three times

Increased by twelve times

Increased by eight times

25 / 30

The distance required to stop a vehicle depends on what?

The size of the wheels

It's speed and weight

The size of the air tanks

The amount of air that applies the brakes

26 / 30

If the speed is doubled, the braking force must be what in order to stop in the same distance?

Four times

Three times

Six times

Eight times

27 / 30

Compressed air is used to transmit what in an air brake system?

Force

Pressure

Liquid

None of these

28 / 30

The amount of heat the brake drums can absorb depends on what?

The length of time the brakes were applied

The make of the brake drums

The thickness of the metal

The age of the brakes

29 / 30

Braking systems use devices to gain a mechanical advantage with the most common device for this purpose being what?

Pulley

Fulcrum

Subservience

Leverage

30 / 30

At what minimum psi is it not necessary for the compressor to pump air?

A minimum of 80 psi

A minimum of 55 psi

A minimum of 60 psi

A minimum of 70 psi

Your score is

Air Brake Practice Test 01

About

Practice Tests

Getting a License

Get In Touch