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

The friction between brake drums and linings generates what?

Noise

Traction

Nothing

Heat

2 / 30

Most brake linings should not exceed what temperature?

375°C

325°C

425°C

400°C

3 / 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

3/4 of a second

1/8 of a second

1/4 of a second

4 / 30

What can be used to gain a mechanical advantage?

Thick brake drums

Air pressure

A solid brake pad

Good tire tread

5 / 30

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

1/12

2/6

1/6

2/3

6 / 30

Most brake linings operate best at around what temperature?

290°C

350°C

250°C

150°C

7 / 30

The compressor is driven by what?

A small motor

Air flow

The vehicle's engine

A generator

8 / 30

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

Braking distance

Size of brake drums

Brake lag

Driver's reaction time

9 / 30

What is the source of compressed air called?

Compressor

Distributor

Governor

Generator

10 / 30

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

Leverage

Fulcrum

Subservience

Pulley

11 / 30

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

Size

Teeth

Missing

Cracks and tension

12 / 30

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

Primary reservoir

One-way check valve

A senator

A governor

13 / 30

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

Bi-pressed

Suppressed

Prepressed

Compressed

14 / 30

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

Three times

Six times

Eight times

Four times

15 / 30

What is meant by the unloading stage?

When the system pressure reaches its minimum

When the air is being discharged from the brakes

When the air is being pushed through the air hoses

When the system pressure reaches its maximum

16 / 30

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

Fans

A reservoir or tank to store the compressed air

A compressor to pump air with a governor to control it

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

17 / 30

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

The vehicle stops quickly

None of these

The brakes work as expected

The wheels stop turning

18 / 30

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

100 psi

135 psi

110 psi

120 psi

19 / 30

The distance required to stop a vehicle depends on what?

The amount of air that applies the brakes

The size of the air tanks

The size of the wheels

It's speed and weight

20 / 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

21 / 30

Too much heat in the brakes could result in what?

Wheel lock-up

Brake damage and possible failure

None of these

Quicker stops

22 / 30

Where does the heat that the brakes generates go to?

The pads

The atmosphere

The tires

The brake lines

23 / 30

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

A minimum of 55 psi

A minimum of 60 psi

A minimum of 70 psi

A minimum of 80 psi

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 twelve times

Increased by six times

Increased by eight times

Increased by three times

25 / 30

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

Liquid

Force

None of these

Pressure

26 / 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 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 takes the air to travel through a properly maintained air brake system

27 / 30

The heat produced is absorbed by what?

The wheel hubs

The brake lines

The metal brake drums

The tires

28 / 30

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

Doubled

Quadrupled

Tripled

The same

29 / 30

A compressor is designed to pump air into what?

Safety valve

Quick release valve

Brake chambers

Reservoir

30 / 30

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

The age of the brakes

The make of the brake drums

The length of time the brakes were applied

The thickness of the metal

Your score is

Air Brake Practice Test 01

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