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

Too much heat in the brakes could result in what?

Quicker stops

Wheel lock-up

Brake damage and possible failure

None of these

2 / 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

3/4 of a second

1/2 of a second

3 / 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

4 / 30

The friction between brake drums and linings generates what?

Noise

Nothing

Heat

Traction

5 / 30

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

One-way check valve

A senator

Primary reservoir

A governor

6 / 30

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

The same

Quadrupled

Doubled

Tripled

7 / 30

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

135 psi

110 psi

100 psi

120 psi

8 / 30

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

Braking distance

Driver's reaction time

Brake lag

Size of brake drums

9 / 30

Where does the heat that the brakes generates go to?

The brake lines

The tires

The pads

The atmosphere

10 / 30

What is the source of compressed air called?

Governor

Distributor

Generator

Compressor

11 / 30

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

The vehicle would stop quicker

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

Nothing different would happen

The brakes would lock

12 / 30

A compressor is designed to pump air into what?

Quick release valve

Safety valve

Reservoir

Brake chambers

13 / 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

14 / 30

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

The age of the brakes

The length of time the brakes were applied

The thickness of the metal

The make of the brake drums

15 / 30

What can be used to gain a mechanical advantage?

Good tire tread

Air pressure

A solid brake pad

Thick brake drums

16 / 30

The heat produced is absorbed by what?

The tires

The brake lines

The wheel hubs

The metal brake drums

17 / 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

18 / 30

Most brake linings should not exceed what temperature?

375°C

425°C

325°C

400°C

19 / 30

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

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

A compressor to pump air with a governor to control it

20 / 30

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

Liquid

Pressure

None of these

Force

21 / 30

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

Teeth

Missing

Size

Cracks and tension

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 three times

Increased by eight times

Increased by twelve times

Increased by six times

23 / 30

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

Eight times

Six times

Three times

Four times

24 / 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 70 psi

A minimum of 80 psi

25 / 30

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

Pulley

Fulcrum

Subservience

Leverage

26 / 30

What is meant by the unloading stage?

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 minimum

When the system pressure reaches its maximum

27 / 30

Most brake linings operate best at around what temperature?

150°C

350°C

250°C

290°C

28 / 30

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

Suppressed

Prepressed

Bi-pressed

Compressed

29 / 30

What is referred to as brake lag?

The time it takes a driver to move their foot from the accelerator to the brake pedal

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

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

30 / 30

The compressor is driven by what?

A generator

Air flow

The vehicle's engine

A small motor

Your score is

Air Brake Practice Test 01

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