Ontario Commercial Drivers License Air Brakes Practice Test 2

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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

Ontario Air Brakes Practice Test 2

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

1 / 20

Why is it important to know where your air system releases air pressure from?

2 / 20

What powers the air brakes air compressor system?

3 / 20

The spring brake is designed for which situation?

4 / 20

Doing this will put unnecessary strain on your vehicles braking system.

5 / 20

What does a governor do in an air brake system?

6 / 20

Which can contaminate a brake systems air lines?

7 / 20

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

8 / 20

What happens to the air valve when you press down the brake?

9 / 20

The air system pressure range must be between _________.

10 / 20

Where is the air pressure gauge for the air brake system?

11 / 20

Which of these is not part of an air brake system?

12 / 20

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

13 / 20

When inspecting an air brake system, the person inspecting should wear?

14 / 20

Most air brake systems will use automatic valves to?

15 / 20

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

16 / 20

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

17 / 20

What is the service brake used for?

18 / 20

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

19 / 20

What is the "cut-out" level?

20 / 20

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

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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 DriveTest or the MTO. 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.