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

The brakes would lock

Nothing different would happen

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

The vehicle would stop quicker

2 / 30

Most brake linings should not exceed what temperature?

325°C

400°C

425°C

375°C

3 / 30

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

Braking distance

Brake lag

Size of brake drums

Driver's reaction time

4 / 30

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

Cracks and tension

Size

Missing

Teeth

5 / 30

The distance required to stop a vehicle depends on what?

The size of the wheels

The amount of air that applies the brakes

The size of the air tanks

It's speed and weight

6 / 30

The heat produced is absorbed by what?

The tires

The metal brake drums

The wheel hubs

The brake lines

7 / 30

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

Leverage

Pulley

Subservience

Fulcrum

8 / 30

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

Compressed

Prepressed

Bi-pressed

Suppressed

9 / 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

Fans

A compressor to pump air with a governor to control it

10 / 30

Where does the heat that the brakes generates go to?

The pads

The atmosphere

The tires

The brake lines

11 / 30

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

Pressure

Liquid

None of these

Force

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 twelve times

Increased by three times

Increased by six times

Increased by eight times

13 / 30

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

None of these

The vehicle stops quickly

The brakes work as expected

The wheels stop turning

14 / 30

The compressor is driven by what?

A small motor

The vehicle's engine

A generator

Air flow

15 / 30

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

The thickness of the metal

The age of the brakes

The length of time the brakes were applied

The make of the brake drums

16 / 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

17 / 30

Too much heat in the brakes could result in what?

Brake damage and possible failure

Wheel lock-up

Quicker stops

None of these

18 / 30

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

Quadrupled

Doubled

Tripled

The same

19 / 30

The friction between brake drums and linings generates what?

Nothing

Noise

Heat

Traction

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

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

110 psi

120 psi

100 psi

135 psi

22 / 30

A compressor is designed to pump air into what?

Quick release valve

Reservoir

Brake chambers

Safety valve

23 / 30

What is meant by the unloading stage?

When the air is being pushed through the air hoses

When the air is being discharged from the brakes

When the system pressure reaches its minimum

When the system pressure reaches its maximum

24 / 30

What can be used to gain a mechanical advantage?

Good tire tread

Air pressure

A solid brake pad

Thick brake drums

25 / 30

What is the source of compressed air called?

Governor

Compressor

Generator

Distributor

26 / 30

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

1/8 of a second

1/2 of a second

3/4 of a second

1/4 of a second

27 / 30

Most brake linings operate best at around what temperature?

290°C

250°C

350°C

150°C

28 / 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

29 / 30

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

Eight times

Three times

Four times

Six times

30 / 30

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

2/6

1/12

2/3

1/6

Your score is

Air Brake Practice Test 01

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