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

The friction between brake drums and linings generates what?

Heat

Noise

Traction

Nothing

2 / 30

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

100 psi

110 psi

120 psi

135 psi

3 / 30

The compressor is driven by what?

Air flow

The vehicle's engine

A small motor

A generator

4 / 30

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

Prepressed

Bi-pressed

Compressed

Suppressed

5 / 30

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

1/12

2/6

1/6

2/3

6 / 30

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

One-way check valve

Primary reservoir

A senator

A governor

7 / 30

Too much heat in the brakes could result in what?

Wheel lock-up

None of these

Brake damage and possible failure

Quicker stops

8 / 30

Most brake linings should not exceed what temperature?

375°C

325°C

425°C

400°C

9 / 30

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

Eight times

Six times

Three times

Four times

10 / 30

Where does the heat that the brakes generates go to?

The atmosphere

The pads

The brake lines

The tires

11 / 30

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

None of these

Force

Pressure

Liquid

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 eight times

Increased by three times

Increased by six times

13 / 30

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

Brake lag

Braking distance

Size of brake drums

Driver's reaction time

14 / 30

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

The vehicle would stop quicker

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

The brakes would lock

Nothing different would happen

15 / 30

What is the source of compressed air called?

Governor

Compressor

Generator

Distributor

16 / 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 thickness of the metal

The make of the brake drums

17 / 30

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

The wheels stop turning

The brakes work as expected

None of these

The vehicle stops quickly

18 / 30

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

Cracks and tension

Size

Missing

Teeth

19 / 30

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

Fulcrum

Leverage

Pulley

Subservience

20 / 30

A compressor is designed to pump air into what?

Quick release valve

Reservoir

Safety valve

Brake chambers

21 / 30

The distance required to stop a vehicle depends on what?

It's speed and weight

The amount of air that applies the brakes

The size of the wheels

The size of the air tanks

22 / 30

Most brake linings operate best at around what temperature?

290°C

250°C

150°C

350°C

23 / 30

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

A minimum of 60 psi

A minimum of 70 psi

A minimum of 80 psi

A minimum of 55 psi

24 / 30

What is meant by the unloading stage?

When the system pressure reaches its minimum

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

25 / 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 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 a driver to move their foot from the accelerator to the brake pedal

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

What can be used to gain a mechanical advantage?

Good tire tread

Thick brake drums

A solid brake pad

Air pressure

28 / 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

29 / 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

Fans

A reservoir or tank to store the compressed air

A compressor to pump air with a governor to control it

30 / 30

The heat produced is absorbed by what?

The metal brake drums

The brake lines

The tires

The wheel hubs

Your score is

Air Brake Practice Test 01

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