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?

The brakes work as expected

The vehicle stops quickly

None of these

The wheels stop turning

2 / 30

What can be used to gain a mechanical advantage?

A solid brake pad

Good tire tread

Thick brake drums

Air pressure

3 / 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 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

4 / 30

The friction between brake drums and linings generates what?

Heat

Nothing

Traction

Noise

5 / 30

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

Nothing different would happen

The vehicle would stop quicker

The brakes would lock

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

6 / 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

7 / 30

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

Teeth

Size

Missing

Cracks and tension

8 / 30

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

A minimum of 60 psi

A minimum of 55 psi

A minimum of 80 psi

A minimum of 70 psi

9 / 30

The compressor is driven by what?

A generator

A small motor

The vehicle's engine

Air flow

10 / 30

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

Compressed

Bi-pressed

Prepressed

Suppressed

11 / 30

Most brake linings should not exceed what temperature?

375°C

400°C

425°C

325°C

12 / 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 six times

Increased by twelve times

Increased by three times

13 / 30

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

Leverage

Subservience

Fulcrum

Pulley

14 / 30

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

A governor

One-way check valve

A senator

Primary reservoir

15 / 30

Most brake linings operate best at around what temperature?

290°C

150°C

250°C

350°C

16 / 30

A compressor is designed to pump air into what?

Quick release valve

Brake chambers

Reservoir

Safety valve

17 / 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

1/4 of a second

1/8 of a second

18 / 30

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

Driver's reaction time

Braking distance

Brake lag

Size of brake drums

19 / 30

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

Liquid

Pressure

Force

None of these

20 / 30

Too much heat in the brakes could result in what?

Wheel lock-up

Quicker stops

Brake damage and possible failure

None of these

21 / 30

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

Doubled

Quadrupled

The same

Tripled

22 / 30

What is the source of compressed air called?

Compressor

Distributor

Generator

Governor

23 / 30

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

1/12

2/3

2/6

1/6

24 / 30

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

110 psi

135 psi

120 psi

100 psi

25 / 30

Where does the heat that the brakes generates go to?

The pads

The atmosphere

The tires

The brake lines

26 / 30

The heat produced is absorbed by what?

The wheel hubs

The metal brake drums

The tires

The brake lines

27 / 30

The distance required to stop a vehicle depends on what?

It's speed and weight

The size of the air tanks

The amount of air that applies the brakes

The size of the wheels

28 / 30

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

The age of the brakes

The thickness of the metal

The length of time the brakes were applied

The make of the brake drums

29 / 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 compressor to pump air with a governor to control it

Fans

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

30 / 30

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

Three times

Four times

Six times

Eight times

Your score is

Air Brake Practice Test 01

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