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

Tripled

Quadrupled

Doubled

The same

2 / 30

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

Missing

Cracks and tension

Size

Teeth

3 / 30

What is the source of compressed air called?

Governor

Compressor

Generator

Distributor

4 / 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

1/4 of a second

3/4 of a second

5 / 30

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

The thickness of the metal

The length of time the brakes were applied

The age of the brakes

The make of the brake drums

6 / 30

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

Driver's reaction time

Brake lag

Braking distance

Size of brake drums

7 / 30

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

Six times

Three times

Four times

Eight times

8 / 30

Most brake linings should not exceed what temperature?

400°C

425°C

325°C

375°C

9 / 30

Where does the heat that the brakes generates go to?

The tires

The pads

The atmosphere

The brake lines

10 / 30

A compressor is designed to pump air into what?

Reservoir

Safety valve

Quick release valve

Brake chambers

11 / 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 six times

Increased by eight times

12 / 30

Too much heat in the brakes could result in what?

Brake damage and possible failure

Quicker stops

None of these

Wheel lock-up

13 / 30

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

A compressor to pump air with a governor to control it

Fans

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

14 / 30

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

Leverage

Subservience

Fulcrum

Pulley

15 / 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

16 / 30

Most brake linings operate best at around what temperature?

350°C

290°C

250°C

150°C

17 / 30

What is meant by the unloading stage?

When the air is being discharged from the brakes

When the system pressure reaches its minimum

When the system pressure reaches its maximum

When the air is being pushed through the air hoses

18 / 30

What can be used to gain a mechanical advantage?

Air pressure

A solid brake pad

Thick brake drums

Good tire tread

19 / 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 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

The time it takes the air to travel through a properly maintained air brake system

20 / 30

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

Primary reservoir

A senator

A governor

One-way check valve

21 / 30

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

The brakes would lock

Nothing different would happen

The vehicle would stop quicker

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

22 / 30

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

None of these

The brakes work as expected

The vehicle stops quickly

The wheels stop turning

23 / 30

The heat produced is absorbed by what?

The wheel hubs

The brake lines

The tires

The metal brake drums

24 / 30

The compressor is driven by what?

The vehicle's engine

Air flow

A generator

A small motor

25 / 30

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

None of these

Pressure

Force

Liquid

26 / 30

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

110 psi

135 psi

100 psi

120 psi

27 / 30

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

A minimum of 60 psi

A minimum of 80 psi

A minimum of 70 psi

A minimum of 55 psi

28 / 30

The friction between brake drums and linings generates what?

Noise

Heat

Nothing

Traction

29 / 30

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

Compressed

Prepressed

Bi-pressed

Suppressed

30 / 30

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

2/6

1/6

2/3

1/12

Your score is

Air Brake Practice Test 01

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