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.

Compatible on desktop, mobile, and tablet, you can take these tests anywhere you have internet access.

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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

To apply for a Class D license you must be?

2 / 20

When you license is suspended you _________.

3 / 20

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

4 / 20

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

5 / 20

What does this upside down triangle sign mean?

6 / 20

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

7 / 20

Tired drivers are often compared to?

8 / 20

What colour are the lights on a school bus arm?

9 / 20

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

10 / 20

What does this yellow sign mean?

11 / 20

The maximum allowable height for a road vehicle is?

12 / 20

What does this sign mean?

13 / 20

What does this yellow diamond sign mean?

14 / 20

What is the "cut in" level?

15 / 20

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

16 / 20

What is the best way to inspect an air compressor?

17 / 20

What does a governor do in an air brake system?

18 / 20

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

19 / 20

What does this speed sign mean?

20 / 20

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

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The average score is 78%

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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.