Quebec Commercial Drivers License Air Brakes Practice Test 1

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Quebec Air Brakes Practice Test 1

A 20 question practice test to help prepare you for your air brakes knowledge test in Quebec

1 / 20

If the outer layer of an airline is damaged, but the inner layer is ok, what should you do?

Replace the line

Cover it with tape

Turn off your air brakes

Leave it alone, it's fine

2 / 20

What function does the alcohol evaporator perform?

Prevents overheating

Prevents freezing

Prevents moisture build ups in the brake lines

Prevents the system from building up too much pressure

3 / 20

What is the "cut-out" level?

The pressure level that triggers the governor to turn on the air compressor

The maximum speed the air brakes can stop at

The safest pressure level you can turn off the truck at

The pressure level that triggers the governor to cut off the air compressor

4 / 20

Where are the air brake chambers located?

Near the compressor

At each wheel

At the back wheels

At the front wheels

5 / 20

Cut in pressure level must never fall below __________.

690 kPa (100 psi)

551 kPa (80 psi)

413 kPa (60 psi)

345 kPa (50 psi)

6 / 20

What is a "glad hand"?

A coupling device

A dance move

The crank for the trailer legs

An emergency supply line

7 / 20

Correct belt tension for an air compressor can be determined by

A karate chop

Firm hand pressure

A tight squeeze of the hand

Finger pressure

8 / 20

What is not a factor in how well your air brake system works?

Driving speed

Brake adjustments

Weight of the driver

Weight of the vehicle

9 / 20

Test the low pressure alarm with the air pressure above __________.

827 kPa (120 psi)

620 kPa (90 psi)

551 kPa (80 psi)

413 kPa (60 psi)

10 / 20

Spring brakes will begin to apply when the pressure starts to drop below?

380 kPa (55 psi)

551 kPa (80 psi)

242 kPs (35 psi)

413 kPa (60 psi)

11 / 20

Th design of the wedge brake system allows them to?

Self lubricate

Self adust

Self seal

Self isolate

12 / 20

What is the best way to inspect an air compressor?

With the engine on in first gear

With the engine off

With the engine on in neutral

With the engine on and in high gear

13 / 20

Why are their two service tanks?

For efficiency

For safety

For fuel economy

Incase you need more stopping power

14 / 20

What is the first thing to look at when inspecting an air brake system?

The foundation brake components

The air compressor

The pressure gauge

The air lines

15 / 20

The full capacity of the air brake system must be available when?

At all times

In city traffic

When traveling at high speed

When going downhill

16 / 20

How long should it take for the air pressure to rise from 587kPa to 690 kPa after the pressure had fallen below 552 kPa?

1 min

5 mins

4 mins

2 mins

17 / 20

The spring brake is designed for which situation?

Skids and emergencies

Loading skids into the trailer

Skids and parking

Parking and emergencies

18 / 20

A commercial vehicle with air brakes engaged must not lose air pressure faster than?

26 kPa/minute

32 kPa/minute

21 kPa/minute

38 kPa/minute

19 / 20

The low air pressure warning device needs to be replaced or adjusted if it does not trigger at a minimum level of?

551 kPa (80 psi)

413 kPa (60 psi)

242 kPs (35 psi)

380 kPa (55 psi)

20 / 20

What should you do when the air brakes low pressure warning comes on?

Check it at the nearest garage

Call the police to let them know

Slow down but keep driving

Stop safely and immediately

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More Quebec Commercial Driving Practice Tests

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Air Brakes Practice Tests

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We do our best to keep the questions current and accurate. The testing centres may change the questions on the knowledge tests at any time. Always be prepared for surprises.

Many of the answers to the questions can be found in the driver hand books or learning materials your province provides.

DISCLAIMER:CDHQ is not affiliated with the provinces or any test centres. These practice tests should not be considered official tests and you are not granted a license for completing them. Our tests are simply a practice tool to help prepare yourself for the real test.