Ontario Commercial Drivers License Class A Practice Test 3

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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Commercial Driver HQ

Class A Ontario Practice Test 3

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

1 / 20

What does this yellow sign mean?

The right lane ends up ahead

Pedestrian crossing up ahead

Pavement ends in right lane

Left lane ends up ahead

2 / 20

How many previous days must a drivers log keep track of?

Twenty one

Fourteen

Seven

Thirty

3 / 20

What does this X sign mean?

Do not enter

Railway crossing

No commercial traffic

Draw bridge

4 / 20

How many hours can a commercial driver drive in one day?

10 hours

13 hours

7 hours

11 hours

5 / 20

A sign shaped like a yellow diamond with these two narrowing lines in the middle means what?

The pavement narrows up ahead

One-way road coming up

Both lanes merge into one lane

Narrow bridge ahead

6 / 20

When a school bus is stopped, how far back must you keep your vehicle?

25 metres away

20 metres away

5 metres away

15 metres away

7 / 20

What does a "No Standing" sign mean?

Do not stand on the road here

You cannot unload your passengers

No loading in the white zone

You cannot stop and leave your vehicle

8 / 20

When can your vehicle be inspected on a highway?

Anytime

During the day

Never

At weight stations

9 / 20

When you are testing your spring brakes, the test is considered a success when?

The front wheels are blocked

The wheels can only turn a half revolution

The vehicle only moves slightly back and forth

The truck can move 1.5 meters

10 / 20

How many off-duty hours must a commercial driver have in a day?

3 hours

7 hours

12 hours

10 hours

11 / 20

Where is the brake lining fastened?

The struts

The brake shoe

The rim of the tire

The wheel well

12 / 20

Driving a commercial vehicle on the road is?

A right

A freedom

A privilege

Hard

13 / 20

When should you be ready to stop for a school bus?

Anytime

In residential areas only

School hours

During the day

14 / 20

Once you've started driving, when should you check your brakes?

Within 25 metres

Once on the road

Within 10 metres

At the stop light

15 / 20

Which valves are the tractor protection system?

The trailer supply valve and the foot valve

The trailer supply valve and the hand valve

The trailer supply valve and the relay emergency valve

The trailer supply valve and the tractor protection valve

16 / 20

How do you fix a leaky glad hand?

Lower pressure in the sytem

Swap the service and supply lines

Tape the seal with duct tape

Inspect the seal for dirt and grit and replace if necessary

17 / 20

After disconnecting from a trailer, a driver should?

Both A and B

Make sure the trailer brakes are applied

Lower the landing gear

Block the wheels with wheel chocks

18 / 20

What must you do at a stop sign with a painted stop line?

Perform a rolling stop

Take a sip of your coffee

Come to a complete stop

Look quickly before proceeding

19 / 20

What is Gross Vehicle Weight Rating?

Maximum size of the load the truck can carry

Determines which bridges the truck can cross

The weight of the load

Maximum weight of the vehicle, driver, and load combined

20 / 20

If the outer layer of an airline is damaged, but the inner layer is ok, what should you do?

Leave it alone, it's fine

Cover it with tape

Turn off your air brakes

Replace the line

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The average score is 85%

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

More Ontario Commercial Driving Practice Tests

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Ontario Class D Practice Tests

Air Brakes Practice Tests

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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.