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 is the source of compressed air called?

Generator

Distributor

Compressor

Governor

2 / 30

The heat produced is absorbed by what?

The brake lines

The tires

The wheel hubs

The metal brake drums

3 / 30

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

Primary reservoir

A governor

A senator

One-way check valve

4 / 30

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

Size of brake drums

Driver's reaction time

Braking distance

Brake lag

5 / 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

6 / 30

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

Cracks and tension

Size

Teeth

Missing

7 / 30

What is referred to as brake lag?

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

The time it takes a driver to move their foot from the accelerator to the brake pedal

8 / 30

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

120 psi

100 psi

135 psi

110 psi

9 / 30

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

Pulley

Subservience

Fulcrum

Leverage

10 / 30

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

1/4 of a second

1/2 of a second

1/8 of a second

3/4 of a second

11 / 30

Most brake linings operate best at around what temperature?

250°C

350°C

290°C

150°C

12 / 30

A compressor is designed to pump air into what?

Quick release valve

Brake chambers

Reservoir

Safety valve

13 / 30

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

2/3

1/12

1/6

2/6

14 / 30

What can be used to gain a mechanical advantage?

A solid brake pad

Thick brake drums

Air pressure

Good tire tread

15 / 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

Nothing different would happen

The vehicle would stop quicker

16 / 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 three times

Increased by eight times

Increased by twelve times

Increased by six times

17 / 30

The friction between brake drums and linings generates what?

Nothing

Traction

Heat

Noise

18 / 30

What is meant by the unloading stage?

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

When the system pressure reaches its minimum

19 / 30

The distance required to stop a vehicle depends on what?

It's speed and weight

The size of the wheels

The size of the air tanks

The amount of air that applies the brakes

20 / 30

Most brake linings should not exceed what temperature?

425°C

325°C

400°C

375°C

21 / 30

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

None of these

The brakes work as expected

The wheels stop turning

The vehicle stops quickly

22 / 30

Too much heat in the brakes could result in what?

Brake damage and possible failure

Quicker stops

Wheel lock-up

None of these

23 / 30

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

The make of the brake drums

The thickness of the metal

The age of the brakes

The length of time the brakes were applied

24 / 30

Where does the heat that the brakes generates go to?

The atmosphere

The tires

The pads

The brake lines

25 / 30

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

Liquid

None of these

Force

Pressure

26 / 30

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

Compressed

Suppressed

Bi-pressed

Prepressed

27 / 30

The compressor is driven by what?

The vehicle's engine

A small motor

Air flow

A generator

28 / 30

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

Eight times

Six times

Four times

Three times

29 / 30

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

A minimum of 80 psi

A minimum of 60 psi

A minimum of 70 psi

A minimum of 55 psi

30 / 30

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

The same

Tripled

Quadrupled

Doubled

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Air Brake Practice Test 01

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