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

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

A minimum of 80 psi

A minimum of 70 psi

A minimum of 55 psi

A minimum of 60 psi

2 / 30

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

Three times

Eight times

Six times

Four times

3 / 30

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

The wheels stop turning

None of these

The vehicle stops quickly

The brakes work as expected

4 / 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 twelve times

Increased by three times

Increased by eight times

5 / 30

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

One-way check valve

Primary reservoir

A senator

A governor

6 / 30

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

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

Nothing different would happen

The brakes would lock

The vehicle would stop quicker

7 / 30

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

Cracks and tension

Teeth

Size

Missing

8 / 30

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

Suppressed

Bi-pressed

Prepressed

Compressed

9 / 30

The compressor is driven by what?

A small motor

The vehicle's engine

Air flow

A generator

10 / 30

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

Brake lag

Driver's reaction time

Braking distance

Size of brake drums

11 / 30

A compressor is designed to pump air into what?

Quick release valve

Reservoir

Brake chambers

Safety valve

12 / 30

Too much heat in the brakes could result in what?

Brake damage and possible failure

None of these

Quicker stops

Wheel lock-up

13 / 30

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

Leverage

Pulley

Subservience

Fulcrum

14 / 30

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

135 psi

120 psi

100 psi

110 psi

15 / 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

16 / 30

Most brake linings operate best at around what temperature?

290°C

250°C

150°C

350°C

17 / 30

Where does the heat that the brakes generates go to?

The pads

The brake lines

The atmosphere

The tires

18 / 30

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

2/6

1/6

1/12

2/3

19 / 30

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

3/4 of a second

1/8 of a second

1/2 of a second

1/4 of a second

20 / 30

Most brake linings should not exceed what temperature?

375°C

425°C

325°C

400°C

21 / 30

What is the source of compressed air called?

Distributor

Generator

Governor

Compressor

22 / 30

What is referred to as brake lag?

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

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

23 / 30

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

Liquid

None of these

Force

Pressure

24 / 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

25 / 30

What can be used to gain a mechanical advantage?

Air pressure

A solid brake pad

Thick brake drums

Good tire tread

26 / 30

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

The make of the brake drums

The length of time the brakes were applied

The age of the brakes

The thickness of the metal

27 / 30

The friction between brake drums and linings generates what?

Heat

Nothing

Noise

Traction

28 / 30

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

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

A reservoir or tank to store the compressed air

Fans

A compressor to pump air with a governor to control it

29 / 30

The distance required to stop a vehicle depends on what?

The size of the air tanks

The amount of air that applies the brakes

The size of the wheels

It's speed and weight

30 / 30

The heat produced is absorbed by what?

The tires

The metal brake drums

The wheel hubs

The brake lines

Your score is

Air Brake Practice Test 01

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