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

Too much heat in the brakes could result in what?

Quicker stops

None of these

Wheel lock-up

Brake damage and possible failure

2 / 30

Most brake linings operate best at around what temperature?

350°C

150°C

250°C

290°C

3 / 30

What can be used to gain a mechanical advantage?

Air pressure

Good tire tread

A solid brake pad

Thick brake drums

4 / 30

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

Teeth

Size

Cracks and tension

Missing

5 / 30

What is referred to as brake lag?

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

The time it takes the brakes to cool down after an application

6 / 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

7 / 30

The distance required to stop a vehicle depends on what?

The amount of air that applies the brakes

The size of the air tanks

It's speed and weight

The size of the wheels

8 / 30

Most brake linings should not exceed what temperature?

400°C

325°C

375°C

425°C

9 / 30

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

Eight times

Three times

Six times

Four times

10 / 30

A compressor is designed to pump air into what?

Quick release valve

Reservoir

Safety valve

Brake chambers

11 / 30

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

Subservience

Fulcrum

Pulley

Leverage

12 / 30

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

A minimum of 70 psi

A minimum of 80 psi

A minimum of 60 psi

A minimum of 55 psi

13 / 30

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

Force

Pressure

Liquid

None of these

14 / 30

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

The same

Quadrupled

Tripled

Doubled

15 / 30

The compressor is driven by what?

Air flow

The vehicle's engine

A generator

A small motor

16 / 30

What is the source of compressed air called?

Generator

Distributor

Compressor

Governor

17 / 30

Where does the heat that the brakes generates go to?

The tires

The atmosphere

The brake lines

The pads

18 / 30

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

110 psi

120 psi

135 psi

100 psi

19 / 30

The heat produced is absorbed by what?

The wheel hubs

The metal brake drums

The tires

The brake lines

20 / 30

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

Suppressed

Compressed

Prepressed

Bi-pressed

21 / 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 twelve times

Increased by eight times

Increased by six times

22 / 30

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

Fans

A reservoir or tank to store the compressed air

A compressor to pump air with a governor to control it

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

23 / 30

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

1/6

2/3

1/12

2/6

24 / 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 system pressure reaches its minimum

When the air is being discharged from the brakes

25 / 30

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

None of these

The wheels stop turning

The brakes work as expected

The vehicle stops quickly

26 / 30

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

The brakes would lock

The vehicle would stop quicker

Nothing different would happen

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

27 / 30

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

A governor

A senator

One-way check valve

Primary reservoir

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 make of the brake drums

The length of time the brakes were applied

29 / 30

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

Braking distance

Driver's reaction time

Brake lag

Size of brake drums

30 / 30

The friction between brake drums and linings generates what?

Heat

Noise

Traction

Nothing

Your score is

Air Brake Practice Test 01

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