Ontario Commercial Drivers License Air Brakes Practice Test 3

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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 3

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

1 / 20

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

2 / 20

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

3 / 20

Where are the air brake chambers located?

4 / 20

What is the "cut in" level?

5 / 20

What is an ABS system?

6 / 20

Most air brake systems will use automatic valves to?

7 / 20

Which statement is true of spring brakes?

8 / 20

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

9 / 20

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

10 / 20

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

11 / 20

Which type of trailer can be towed before the service tanks are full?

12 / 20

Which colour usually means the air line is a service line?

13 / 20

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

14 / 20

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

15 / 20

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

16 / 20

Where are the vehicles air tanks located?

17 / 20

Which of these significantly decreases the brake force produced at the wheel?

18 / 20

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

19 / 20

What might happen if the air lines are cross connected?

20 / 20

Th design of the wedge brake system allows them to?

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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.