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

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

Turn off your air brakes

Cover it with tape

Replace the line

2 / 20

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

One-way road coming up

The pavement narrows up ahead

Both lanes merge into one lane

Narrow bridge ahead

3 / 20

When can your vehicle be inspected on a highway?

At weight stations

During the day

Anytime

Never

4 / 20

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

The truck can move 1.5 meters

The front wheels are blocked

The wheels can only turn a half revolution

The vehicle only moves slightly back and forth

5 / 20

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

Perform a rolling stop

Come to a complete stop

Take a sip of your coffee

Look quickly before proceeding

6 / 20

What does a "No Standing" sign mean?

No loading in the white zone

Do not stand on the road here

You cannot stop and leave your vehicle

You cannot unload your passengers

7 / 20

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

20 metres away

25 metres away

15 metres away

5 metres away

8 / 20

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

Twenty one

Seven

Thirty

Fourteen

9 / 20

Which valves are the tractor protection system?

The trailer supply valve and the hand valve

The trailer supply valve and the foot valve

The trailer supply valve and the tractor protection valve

The trailer supply valve and the relay emergency valve

10 / 20

How do you fix a leaky glad hand?

Swap the service and supply lines

Tape the seal with duct tape

Lower pressure in the sytem

Inspect the seal for dirt and grit and replace if necessary

11 / 20

What does this X sign mean?

Draw bridge

Do not enter

Railway crossing

No commercial traffic

12 / 20

Where is the brake lining fastened?

The brake shoe

The struts

The wheel well

The rim of the tire

13 / 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

14 / 20

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

During the day

In residential areas only

Anytime

School hours

15 / 20

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

7 hours

10 hours

12 hours

3 hours

16 / 20

What is Gross Vehicle Weight Rating?

Maximum weight of the vehicle, driver, and load combined

Determines which bridges the truck can cross

The weight of the load

Maximum size of the load the truck can carry

17 / 20

What does this yellow sign mean?

Pedestrian crossing up ahead

Left lane ends up ahead

Pavement ends in right lane

The right lane ends up ahead

18 / 20

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

10 hours

7 hours

13 hours

11 hours

19 / 20

After disconnecting from a trailer, a driver should?

Block the wheels with wheel chocks

Lower the landing gear

Make sure the trailer brakes are applied

Both A and B

20 / 20

Driving a commercial vehicle on the road is?

A freedom

Hard

A right

A privilege

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Your score is

The average score is 84%

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

More Ontario Commercial Driving Practice Tests

Ontario Class A Practice Tests

Ontario Class D Practice Tests

Air Brakes Practice Tests

Ontario Road Signs Test

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.