Ontario Commercial Drivers License Class A Practice Test 1

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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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Class AZ Ontario Practice Test 1

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

1 / 20

The tallest your vehicle can be is?

4.15 m

3.75 m

5.00 m

5.30 m

2 / 20

How much air loss is allowed for a tractor and a trailer when the brakes are engaged?

32 kPa/minute

28 kPa/minute

34 kPa/minute

26 kPa/minute

3 / 20

What type of license do you need to driver a semi trailer?

Class Z

Class M / Class 6

Class D / Class 3

Class A / Class 1

4 / 20

What does the sign below tell you?

When lights are flashing it is safe to cross the road

This road has a maximum speed limit of 40km/h at all times

This is a school zone when the lights are flashing

School zone. Observe the speed limit shown when the yellow lights are flashing

5 / 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

6 / 20

Which of these vehicle driver’s are exempt from the Hours of Service Regulations?

All of the above

RV’s or Motor Homes

Mobile cranes

Tow vehicles

7 / 20

What don’t a vehicle’s back wheels usually do?

Tricks

Spin

Rotate

Pivot

8 / 20

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

2 times as much

3 times as much

10 times as much

6 times as much

9 / 20

When backing up a to a trailer, align the 5th wheel slot with?

The lines painted on the pavement

The trailer

None of the above

The kingpin on the trailer

10 / 20

What should a trailer hand valve be used for?

To link a trailer that is not equipped with spring brakes

Applying the spring brakes

Lowering the trailers landing gear

Stopping the trailer at stop lights

11 / 20

What does this yellow diamond warning sign mean?

Road ends in 3.9 meters

Only vehicles over 3.9 meters wide allowed

Underpass ahead, clearance is 3.9 meters

Narrow road up ahead

12 / 20

How long should it take for the air pressure to rise from 587kPa to 690 kPa after the pressure had fallen below 552 kPa?

5 mins

1 min

4 mins

2 mins

13 / 20

When towing a trailer, you will usually be able to tell if it is employing ABS by?

Listening for the sound of the ABS

The feel of the brake pedal

Checking for lights in your mirror

Looking at it

14 / 20

Which party is responsible for ensuring correct and compliant weight of a shipment?

Drivers and shippers

Drivers, operators, and shippers

Drivers only

Drivers and operators

15 / 20

What does this warning sign with a truck rolling down a hill mean?

Truck runaway up ahead

Trucks roll faster downhill

Truck entrance up ahead

Steep hill ahead. You may need to use a lower gear

16 / 20

Drivers must operate in a cycle. What are the two cycles available to drivers?

A Seven or twenty one day cycle

A five or ten day cycle

A seven or fourteen day cycle

A fourteen or twenty-one day cycle

17 / 20

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

Stop at the inspection stations for an inspection

Decide whether or not you want to stop

Wait for an inspector to direct you into the station

Only stop if you have not been inspected recently

18 / 20

What does this diamond shaped sign with a checkered border and a pointed arrow mean?

Sharp turn or bend in the road in the direction of the arrow

Road ends in the direction of the arrow

Taxi lanes to the right

Keep to the right side of the road

19 / 20

Which of these are indicators that you may have difficulty with the clearance under your vehicle?

Flooding

All of the below

Road condition

Ice

20 / 20

What is the best way to inspect an air compressor?

With the engine on and in high gear

With the engine on in neutral

With the engine off

With the engine on in first gear

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The average score is 79%

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.