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

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

100 psi

135 psi

120 psi

110 psi

2 / 30

The friction between brake drums and linings generates what?

Noise

Nothing

Heat

Traction

3 / 30

What can be used to gain a mechanical advantage?

Good tire tread

Air pressure

Thick brake drums

A solid brake pad

4 / 30

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

Six times

Three times

Eight times

Four times

5 / 30

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

Primary reservoir

One-way check valve

A governor

A senator

6 / 30

Most brake linings operate best at around what temperature?

290°C

250°C

350°C

150°C

7 / 30

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

Driver's reaction time

Braking distance

Brake lag

Size of brake drums

8 / 30

Most brake linings should not exceed what temperature?

325°C

400°C

375°C

425°C

9 / 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

10 / 30

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

Subservience

Leverage

Pulley

Fulcrum

11 / 30

Too much heat in the brakes could result in what?

None of these

Brake damage and possible failure

Quicker stops

Wheel lock-up

12 / 30

What is meant by the unloading stage?

When the system pressure reaches its maximum

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

13 / 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

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

Fans

14 / 30

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

The vehicle would stop quicker

The brakes would lock

Nothing different would happen

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

15 / 30

Where does the heat that the brakes generates go to?

The atmosphere

The brake lines

The tires

The pads

16 / 30

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

2/3

1/12

1/6

2/6

17 / 30

The compressor is driven by what?

Air flow

A small motor

A generator

The vehicle's engine

18 / 30

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

The vehicle stops quickly

None of these

The brakes work as expected

The wheels stop turning

19 / 30

What is the source of compressed air called?

Compressor

Governor

Generator

Distributor

20 / 30

The heat produced is absorbed by what?

The metal brake drums

The brake lines

The wheel hubs

The tires

21 / 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

3/4 of a second

1/4 of a second

22 / 30

A compressor is designed to pump air into what?

Brake chambers

Quick release valve

Reservoir

Safety valve

23 / 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

24 / 30

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

Liquid

None of these

Pressure

Force

25 / 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

26 / 30

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

Quadrupled

Tripled

Doubled

The same

27 / 30

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

Suppressed

Prepressed

Bi-pressed

Compressed

28 / 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 eight times

Increased by six times

29 / 30

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

A minimum of 80 psi

A minimum of 70 psi

A minimum of 60 psi

A minimum of 55 psi

30 / 30

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

Teeth

Cracks and tension

Missing

Size

Your score is

Air Brake Practice Test 01

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