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

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

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

A reservoir or tank to store the compressed air

Fans

2 / 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 eight times

Increased by six times

3 / 30

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

The same

Quadrupled

Doubled

Tripled

4 / 30

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

Nothing different would happen

The brakes would lock

The vehicle would stop quicker

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

5 / 30

The compressor is driven by what?

Air flow

The vehicle's engine

A generator

A small motor

6 / 30

A compressor is designed to pump air into what?

Quick release valve

Safety valve

Reservoir

Brake chambers

7 / 30

What is the source of compressed air called?

Distributor

Compressor

Governor

Generator

8 / 30

Too much heat in the brakes could result in what?

Quicker stops

None of these

Brake damage and possible failure

Wheel lock-up

9 / 30

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

Prepressed

Bi-pressed

Compressed

Suppressed

10 / 30

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

The brakes work as expected

The wheels stop turning

None of these

The vehicle stops quickly

11 / 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 take the brakes to stop the vehicle once the brakes have been applied

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

12 / 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

1/8 of a second

3/4 of a second

1/4 of a second

13 / 30

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

Braking distance

Brake lag

Size of brake drums

Driver's reaction time

14 / 30

The distance required to stop a vehicle depends on what?

The size of the air tanks

It's speed and weight

The size of the wheels

The amount of air that applies the brakes

15 / 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

16 / 30

What can be used to gain a mechanical advantage?

Good tire tread

Air pressure

A solid brake pad

Thick brake drums

17 / 30

Where does the heat that the brakes generates go to?

The atmosphere

The tires

The pads

The brake lines

18 / 30

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

A minimum of 80 psi

A minimum of 55 psi

A minimum of 60 psi

A minimum of 70 psi

19 / 30

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

Subservience

Pulley

Leverage

Fulcrum

20 / 30

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

Teeth

Cracks and tension

Size

Missing

21 / 30

The friction between brake drums and linings generates what?

Nothing

Noise

Heat

Traction

22 / 30

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

Pressure

Force

Liquid

None of these

23 / 30

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

A senator

Primary reservoir

One-way check valve

A governor

24 / 30

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

1/6

2/6

2/3

1/12

25 / 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 maximum

When the system pressure reaches its minimum

26 / 30

Most brake linings operate best at around what temperature?

250°C

290°C

350°C

150°C

27 / 30

Most brake linings should not exceed what temperature?

375°C

325°C

425°C

400°C

28 / 30

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

The age of the brakes

The length of time the brakes were applied

The make of the brake drums

The thickness of the metal

29 / 30

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

135 psi

110 psi

100 psi

120 psi

30 / 30

The heat produced is absorbed by what?

The wheel hubs

The tires

The metal brake drums

The brake lines

Your score is

Air Brake Practice Test 01

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