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

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

Missing

Teeth

Cracks and tension

Size

2 / 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

1/8 of a second

3/4 of a second

3 / 30

What can be used to gain a mechanical advantage?

A solid brake pad

Air pressure

Good tire tread

Thick brake drums

4 / 30

Most brake linings should not exceed what temperature?

375°C

400°C

325°C

425°C

5 / 30

What is the source of compressed air called?

Distributor

Compressor

Governor

Generator

6 / 30

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

Three times

Four times

Eight times

Six times

7 / 30

The heat produced is absorbed by what?

The tires

The brake lines

The wheel hubs

The metal brake drums

8 / 30

Most brake linings operate best at around what temperature?

350°C

250°C

150°C

290°C

9 / 30

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

Subservience

Fulcrum

Pulley

Leverage

10 / 30

A compressor is designed to pump air into what?

Reservoir

Quick release valve

Brake chambers

Safety valve

11 / 30

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

The age of the brakes

The thickness of the metal

The length of time the brakes were applied

The make of the brake drums

12 / 30

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

A senator

A governor

One-way check valve

Primary reservoir

13 / 30

The compressor is driven by what?

A generator

A small motor

Air flow

The vehicle's engine

14 / 30

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

The same

Tripled

Doubled

Quadrupled

15 / 30

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

The wheels stop turning

The vehicle stops quickly

The brakes work as expected

None of these

16 / 30

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

Compressed

Suppressed

Bi-pressed

Prepressed

17 / 30

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

Pressure

Force

Liquid

None of these

18 / 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 maximum

When the system pressure reaches its minimum

19 / 30

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

2/3

1/12

2/6

1/6

20 / 30

The distance required to stop a vehicle depends on what?

The size of the wheels

The amount of air that applies the brakes

The size of the air tanks

It's speed and weight

21 / 30

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

Size of brake drums

Driver's reaction time

Braking distance

Brake lag

22 / 30

Too much heat in the brakes could result in what?

None of these

Quicker stops

Wheel lock-up

Brake damage and possible failure

23 / 30

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

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

A compressor to pump air with a governor to control it

24 / 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 70 psi

A minimum of 80 psi

25 / 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 takes a driver to move their foot from the accelerator to the brake pedal

The time it take the brakes to stop the vehicle once the brakes have been applied

26 / 30

The friction between brake drums and linings generates what?

Noise

Nothing

Traction

Heat

27 / 30

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

100 psi

120 psi

135 psi

110 psi

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 three times

Increased by six times

Increased by eight times

Increased by twelve times

29 / 30

Where does the heat that the brakes generates go to?

The atmosphere

The pads

The tires

The brake lines

30 / 30

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

The brakes would lock

The vehicle would stop quicker

Nothing different would happen

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

Your score is

Air Brake Practice Test 01

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