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

2/6

1/6

1/12

2/3

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 eight times

Increased by three times

Increased by six times

Increased by twelve times

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

A reservoir or tank to store the compressed air

4 / 30

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

The brakes work as expected

The vehicle stops quickly

The wheels stop turning

None of these

5 / 30

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

The length of time the brakes were applied

The make of the brake drums

The age of the brakes

The thickness of the metal

6 / 30

The time it takes from the momenta hazard is recognized to the time the brake is applied is approximately how much?

1/4 of a second

1/2 of a second

3/4 of a second

1/8 of a second

7 / 30

Most brake linings operate best at around what temperature?

150°C

250°C

290°C

350°C

8 / 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

9 / 30

Too much heat in the brakes could result in what?

Brake damage and possible failure

Wheel lock-up

Quicker stops

None of these

10 / 30

What is the source of compressed air called?

Distributor

Compressor

Generator

Governor

11 / 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

Nothing different would happen

The brakes would lock

The vehicle would stop quicker

12 / 30

The compressor is driven by what?

A generator

A small motor

Air flow

The vehicle's engine

13 / 30

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

Teeth

Cracks and tension

Size

Missing

14 / 30

A compressor is designed to pump air into what?

Quick release valve

Safety valve

Reservoir

Brake chambers

15 / 30

The friction between brake drums and linings generates what?

Noise

Nothing

Traction

Heat

16 / 30

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

Tripled

The same

Quadrupled

Doubled

17 / 30

Where does the heat that the brakes generates go to?

The brake lines

The pads

The atmosphere

The tires

18 / 30

Most brake linings should not exceed what temperature?

400°C

375°C

425°C

325°C

19 / 30

The heat produced is absorbed by what?

The brake lines

The wheel hubs

The metal brake drums

The tires

20 / 30

What can be used to gain a mechanical advantage?

Thick brake drums

A solid brake pad

Air pressure

Good tire tread

21 / 30

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

A governor

Primary reservoir

One-way check valve

A senator

22 / 30

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

Driver's reaction time

Size of brake drums

Braking distance

Brake lag

23 / 30

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

120 psi

100 psi

110 psi

135 psi

24 / 30

The distance required to stop a vehicle depends on what?

The amount of air that applies the brakes

The size of the wheels

It's speed and weight

The size of the air tanks

25 / 30

What is meant by the unloading stage?

When the system pressure reaches its minimum

When the system pressure reaches its maximum

When the air is being discharged from the brakes

When the air is being pushed through the air hoses

26 / 30

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

Pulley

Leverage

Fulcrum

Subservience

27 / 30

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

A minimum of 55 psi

A minimum of 80 psi

A minimum of 70 psi

A minimum of 60 psi

28 / 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

29 / 30

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

Suppressed

Prepressed

Bi-pressed

Compressed

30 / 30

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

Liquid

Pressure

None of these

Force

Your score is

Air Brake Practice Test 01

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