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

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

None of these

The brakes work as expected

The vehicle stops quickly

The wheels stop turning

2 / 30

The heat produced is absorbed by what?

The brake lines

The metal brake drums

The wheel hubs

The tires

3 / 30

What is referred to as brake lag?

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

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

4 / 30

Too much heat in the brakes could result in what?

Brake damage and possible failure

Wheel lock-up

None of these

Quicker stops

5 / 30

The distance required to stop a vehicle depends on what?

It's speed and weight

The size of the air tanks

The size of the wheels

The amount of air that applies the brakes

6 / 30

The friction between brake drums and linings generates what?

Nothing

Noise

Heat

Traction

7 / 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

8 / 30

Most brake linings should not exceed what temperature?

425°C

375°C

325°C

400°C

9 / 30

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

Primary reservoir

A senator

One-way check valve

A governor

10 / 30

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

The thickness of the metal

The make of the brake drums

The age of the brakes

The length of time the brakes were applied

11 / 30

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

Eight times

Four times

Six times

Three times

12 / 30

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

Liquid

Pressure

Force

None of these

13 / 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

1/4 of a second

1/2 of a second

14 / 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 eight times

Increased by twelve times

Increased by six times

Increased by three times

15 / 30

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

Cracks and tension

Size

Teeth

Missing

16 / 30

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

The brakes would lock

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

The vehicle would stop quicker

Nothing different would happen

17 / 30

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

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

A compressor to pump air with a governor to control it

Fans

18 / 30

What can be used to gain a mechanical advantage?

Thick brake drums

Good tire tread

A solid brake pad

Air pressure

19 / 30

The compressor is driven by what?

A generator

The vehicle's engine

A small motor

Air flow

20 / 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

21 / 30

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

Pulley

Subservience

Leverage

Fulcrum

22 / 30

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

120 psi

100 psi

135 psi

110 psi

23 / 30

What is meant by the unloading stage?

When the air is being discharged from the brakes

When the system pressure reaches its maximum

When the air is being pushed through the air hoses

When the system pressure reaches its minimum

24 / 30

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

Bi-pressed

Prepressed

Compressed

Suppressed

25 / 30

Where does the heat that the brakes generates go to?

The pads

The tires

The brake lines

The atmosphere

26 / 30

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

Brake lag

Size of brake drums

Driver's reaction time

Braking distance

27 / 30

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

A minimum of 60 psi

A minimum of 80 psi

A minimum of 55 psi

A minimum of 70 psi

28 / 30

A compressor is designed to pump air into what?

Reservoir

Quick release valve

Safety valve

Brake chambers

29 / 30

Most brake linings operate best at around what temperature?

150°C

290°C

350°C

250°C

30 / 30

What is the source of compressed air called?

Distributor

Generator

Governor

Compressor

Your score is

Air Brake Practice Test 01

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