Ontario Commercial Drivers License Air Brakes Practice Test 5

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Our FREE practice tests are designed to help you succeed when it comes time to write the real test.

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 5

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

1 / 20

You should be looking for this when checking your brake chambers?

2 / 20

The spring brake is designed for which situation?

3 / 20

Cut in pressure level must never fall below __________.

4 / 20

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

5 / 20

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

6 / 20

Cut out pressure level must never exceed __________.

7 / 20

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

8 / 20

Spring brake controls are usually what color?

9 / 20

What is a "glad hand"?

10 / 20

The pushrod stroke occurs when compressed air enters the?

11 / 20

What does a governor do in an air brake system?

12 / 20

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

13 / 20

Where are the air brake chambers located?

14 / 20

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

15 / 20

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

16 / 20

Activation of trailer spring brakes can be checked by?

17 / 20

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

18 / 20

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

19 / 20

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

20 / 20

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

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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.