Quebec Commercial Drivers License Air Brakes Practice Test 5

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Quebec Air Brakes Practice Test 5

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

1 / 20

What is the best way to inspect an air compressor?

With the engine on and in high gear

With the engine on in first gear

With the engine off

With the engine on in neutral

2 / 20

Th design of the wedge brake system allows them to?

Self isolate

Self adust

Self seal

Self lubricate

3 / 20

Which colour represent the trailer supply line?

Red

Blue

White

Yellow

4 / 20

Who can perform adjustments and maintenance on your air brake system?

Your employer

Only certified technicians

Anyone

You can if you are the owner

5 / 20

What powers the air brakes air compressor system?

The battery

The rotation of the wheels

The trucks engine

Overhead wires

6 / 20

Cut out pressure level must never exceed __________.

862 kPa (125 psi)

690 kPa (100 psi)

1000 kPa (145 psi)

1138 kPa (165 psi)

7 / 20

What is the most frequent reason a vehicle is removed from service?

Air brakes

Over weight limits

Sleepy drivers

Tire treads

8 / 20

A warning system must alert the driver when the pressure drops below?

242 kPs (35 psi)

380 kPa (55 psi)

551 kPa (80 psi)

413 kPa (60 psi)

9 / 20

The supply tank should discharge more moisture than any other tank?

True

False

10 / 20

What is the "cut in" 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

11 / 20

Finding a small bit of oil during an inspection is no cause for concern if its coming from the _____________?

The second tank

Wheel bearings

The first tank

Supply tank

12 / 20

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

Leave it alone, it's fine

Replace the line

Turn off your air brakes

Cover it with tape

13 / 20

When you are testing your spring brakes, the test is considered a success when?

The front wheels are blocked

The truck can move 1.5 meters

The wheels can only turn a half revolution

The vehicle only moves slightly back and forth

14 / 20

A vehicle should have wheel chocks or blocks securing it in place during inspection if...?

Any of these apply

The driver is not within 50 m of the vehicle

The driver leaves the cab without applying the parking brake

The driver leaves the cab under any circumstances

15 / 20

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

551 kPa (80 psi)

620 kPa (90 psi)

827 kPa (120 psi)

413 kPa (60 psi)

16 / 20

You test a tractor protection valve by removing the service line and?

Engaging the brake pedal

Driving 150 metres

Switching the gears

Starting the truck

17 / 20

The pushrod stroke occurs when compressed air enters the?

Brake chamber

Supply tank

Air compressor

Engine block

18 / 20

How much air loss is allowed for a tractor and a trailer when the brakes are engaged?

34 kPa/minute

28 kPa/minute

32 kPa/minute

26 kPa/minute

19 / 20

To measure the time it takes to build up pressure in the air system, the engine should be idling between _______________.

600 to 900 RPM

200 to 500 RPM

1000 to 2000 RPM

800 to 1000 RPM

20 / 20

What is a "glad hand"?

An emergency supply line

The crank for the trailer legs

A dance move

A coupling device

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The average score is 83%

More Quebec Commercial Driving Practice Tests

Quebec Class 1 Practice Tests

Quebec Class 3 Practice Tests

Air Brakes Practice Tests

Quebec Class 4 Practice Tests

Quebec Road Signs Test

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.