Ontario Commercial Drivers License Class D Practice Test 1

Commercial Driver HQ is a website focused on helping new commercial drivers in all provinces and territories in Canada.

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 Class D Practice Test 1

A 20 question practice test to help prepare you for the Class DZ knowledge test in Ontario

1 / 20

What does this yellow diamond sign mean?

2 / 20

What does this speed sign mean?

3 / 20

A broken yellow line on the pavement to the left of you means what?

4 / 20

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

5 / 20

What does this sign mean?

6 / 20

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

7 / 20

The maximum allowable height for a road vehicle is?

8 / 20

What does this upside down triangle sign mean?

9 / 20

How much stopping distance does a truck need compared to a normal car?

10 / 20

What does a governor do in an air brake system?

11 / 20

What is the best way to inspect an air compressor?

12 / 20

Tired drivers are often compared to?

13 / 20

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

14 / 20

What does this yellow sign mean?

15 / 20

When you license is suspended you _________.

16 / 20

To apply for a Class D license you must be?

17 / 20

What colour are the lights on a school bus arm?

18 / 20

Class D license holders under age 80 must pass a knowledge and vision test every?

19 / 20

What is the "cut in" level?

20 / 20

If you see an open truck inspection station which driving your truck, you must?

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The average score is 84%


Want to know more? Learn all about getting your DZ drivers license in Ontario

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.