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

Where does the heat that the brakes generates go to?

The brake lines

The atmosphere

The pads

The tires

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 eight times

Increased by three times

Increased by six times

3 / 30

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

Pulley

Fulcrum

Subservience

Leverage

4 / 30

Most brake linings should not exceed what temperature?

375°C

425°C

325°C

400°C

5 / 30

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

Prepressed

Bi-pressed

Suppressed

Compressed

6 / 30

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

The make of the brake drums

The age of the brakes

The thickness of the metal

The length of time the brakes were applied

7 / 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

8 / 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

9 / 30

The distance required to stop a vehicle depends on what?

The size of the wheels

It's speed and weight

The amount of air that applies the brakes

The size of the air tanks

10 / 30

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

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

The brakes would lock

The vehicle would stop quicker

Nothing different would happen

11 / 30

The friction between brake drums and linings generates what?

Heat

Nothing

Traction

Noise

12 / 30

What can be used to gain a mechanical advantage?

Air pressure

A solid brake pad

Good tire tread

Thick brake drums

13 / 30

Most brake linings operate best at around what temperature?

150°C

290°C

250°C

350°C

14 / 30

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

None of these

Force

Pressure

Liquid

15 / 30

A compressor is designed to pump air into what?

Quick release valve

Brake chambers

Safety valve

Reservoir

16 / 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

17 / 30

Too much heat in the brakes could result in what?

None of these

Brake damage and possible failure

Quicker stops

Wheel lock-up

18 / 30

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

A minimum of 55 psi

A minimum of 60 psi

A minimum of 80 psi

A minimum of 70 psi

19 / 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

20 / 30

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

120 psi

135 psi

110 psi

100 psi

21 / 30

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

Eight times

Three times

Four times

Six times

22 / 30

The compressor is driven by what?

The vehicle's engine

A small motor

Air flow

A generator

23 / 30

What is the source of compressed air called?

Compressor

Generator

Governor

Distributor

24 / 30

The heat produced is absorbed by what?

The metal brake drums

The wheel hubs

The tires

The brake lines

25 / 30

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

The vehicle stops quickly

The wheels stop turning

The brakes work as expected

None of these

26 / 30

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

Tripled

The same

Doubled

Quadrupled

27 / 30

What is meant by the unloading stage?

When the system pressure reaches its minimum

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

28 / 30

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

1/6

2/6

1/12

2/3

29 / 30

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

Brake lag

Braking distance

Driver's reaction time

Size of brake drums

30 / 30

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

Cracks and tension

Teeth

Missing

Size

Your score is

Air Brake Practice Test 01

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