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

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

Six times

Eight times

Three times

Four times

2 / 30

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

Fulcrum

Leverage

Pulley

Subservience

3 / 30

A compressor is designed to pump air into what?

Reservoir

Brake chambers

Safety valve

Quick release valve

4 / 30

The friction between brake drums and linings generates what?

Nothing

Noise

Traction

Heat

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 compressor to pump air with a governor to control it

Fans

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

6 / 30

Where does the heat that the brakes generates go to?

The atmosphere

The brake lines

The pads

The tires

7 / 30

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

Liquid

None of these

Pressure

Force

8 / 30

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

Bi-pressed

Suppressed

Prepressed

Compressed

9 / 30

Too much heat in the brakes could result in what?

Wheel lock-up

Brake damage and possible failure

Quicker stops

None of these

10 / 30

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

120 psi

110 psi

135 psi

100 psi

11 / 30

Most brake linings should not exceed what temperature?

325°C

375°C

425°C

400°C

12 / 30

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

The vehicle would stop quicker

Nothing different would happen

The brakes would lock

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

13 / 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

14 / 30

Most brake linings operate best at around what temperature?

150°C

250°C

290°C

350°C

15 / 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

1/4 of a second

1/2 of a second

3/4 of a second

16 / 30

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

The brakes work as expected

None of these

The vehicle stops quickly

The wheels stop turning

17 / 30

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

Tripled

Quadrupled

Doubled

The same

18 / 30

What is the source of compressed air called?

Generator

Distributor

Compressor

Governor

19 / 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

20 / 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

21 / 30

The compressor is driven by what?

A generator

The vehicle's engine

Air flow

A small motor

22 / 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 six times

Increased by three times

Increased by eight times

Increased by twelve times

23 / 30

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

Size of brake drums

Braking distance

Brake lag

Driver's reaction time

24 / 30

The heat produced is absorbed by what?

The brake lines

The tires

The metal brake drums

The wheel hubs

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 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

26 / 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

27 / 30

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

The thickness of the metal

The make of the brake drums

The age of the brakes

The length of time the brakes were applied

28 / 30

What can be used to gain a mechanical advantage?

Good tire tread

Thick brake drums

Air pressure

A solid brake pad

29 / 30

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

1/12

2/3

2/6

1/6

30 / 30

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

Size

Missing

Cracks and tension

Teeth

Your score is

Air Brake Practice Test 01

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