Quebec Commercial Drivers License Air Brakes Practice Test 4

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Each license type has 5 tests to help you study and become familiar with the rules and regulations of commercial driving. The tests are not identical to the license test you will need to pass, but the questions are similar to what you will find on the real deal.

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Created by Commercial Driver HQ

Quebec Air Brakes Practice Test 4

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

1 / 20

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

2 / 20

Before inspecting for air brake chamber leaks, you must __________.

3 / 20

Why are their two service tanks?

4 / 20

Trailer air brake systems must apply a spring brake when the pressure drops below?

5 / 20

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

6 / 20

Spring brake controls are usually what color?

7 / 20

To make sure the air tanks are securely attached to the vehicle you should?

8 / 20

Manufactures recommend draining moisture and oil in an air system on a _______ basis.

9 / 20

The best way to reduce rough and abrupt braking is to?

10 / 20

Any commercial vehicle with air brakes must not lose system pressure with the brakes applied at a rate of more than?

11 / 20

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

12 / 20

What is the service brake used for?

13 / 20

Which tank should be drained first when draining the air tanks on an air brake system?

14 / 20

System air loss should be measured by applying the brake for how long?

15 / 20

Most air brake systems will use automatic valves to?

16 / 20

When can you adjust your own air brakes?

17 / 20

Which of these vehicles would usually have an air brake system?

18 / 20

When you are going twice the speed, your brakes will need to work ________ time harder to stop your vehicle.

19 / 20

The air system pressure range must be between _________.

20 / 20

If brake chambers on opposite side of an axle are different sizes, this may cause?

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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.