Ontario Commercial Drivers License Class D Practice Test 2

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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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Commercial Driver HQ

Ontario Class D Practice Test 2

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

1 / 20

What does this sign mean?

Not a two lane highway

Carpool lane only

Cars side by side only

No passing

2 / 20

What does this sign mean?

No stopping

No u-turns

One way only

No through traffic

3 / 20

What does this yellow diamond sign mean?

Divided highway ends

Road construction ahead

Divided highway begins

Narrow bridge ahead

4 / 20

When you turn 65, you now need to submit a medical report how often?

Every 2 years

Annually

Monthly

Quarterly

5 / 20

What does this yellow diamond sign mean?

Slight bend in the road ahead

Winding road ahead

Sharp curve to the right

Right turn only

6 / 20

Where is the brake lining fastened?

The rim of the tire

The struts

The wheel well

The brake shoe

7 / 20

What type of training do you need to operate air brakes?

AB License

Class M License

A college course

Z-endorsement

8 / 20

Which piece of information needs to appear on your drivers log?

Where you start and end your day

Log cycle

Driver name

All of these

9 / 20

A circle check is?

Drawing circles to prove you are not tired

A visual check for cosmetic damage

Testing your brakes while driving in a circle

A daily check of your vehicles roadworthiness

10 / 20

When going down hills you should?

Pick up speed

Shift into a higher gear

Wear your seatbelt

Shift into a lower gear

11 / 20

Who can install and repair wheels and tires?

A monkey

A qualified professional

Anyone

A doctor

12 / 20

The low air pressure warning device needs to be replaced or adjusted if it does not trigger at a minimum level of?

551 kPa (80 psi)

413 kPa (60 psi)

242 kPs (35 psi)

380 kPa (55 psi)

13 / 20

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

15 metres away

20 metres away

25 metres away

5 metres away

14 / 20

What is Gross Vehicle Weight Rating?

Maximum weight of the vehicle, driver, and load combined

The weight of the load

Determines which bridges the truck can cross

Maximum size of the load the truck can carry

15 / 20

Activation of trailer spring brakes can be checked by?

Pulling the trailer air valve

Gunning it

Applying slight engine power

Rocking the truck back and forth

16 / 20

What is the "cut in" level?

The safest pressure level you can turn off the truck at

The pressure level that triggers the governor to turn on the air compressor

The maximum speed the air brakes can stop at

The pressure level that triggers the governor to cut off the air compressor

17 / 20

Cut in pressure level must never fall below __________.

345 kPa (50 psi)

551 kPa (80 psi)

413 kPa (60 psi)

690 kPa (100 psi)

18 / 20

Finding a small bit of oil during an inspection is no cause for concern if its coming from the _____________?

Supply tank

Wheel bearings

The first tank

The second tank

19 / 20

What does this sign tell you about the road ahead?

Bumps on the pavement ahead

Bridge ahead

River ahead

Construction zone ahead

20 / 20

When can your vehicle be inspected on a highway?

At weight stations

Anytime

During the day

Never

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Your score is

The average score is 86%

Want to know more? Learn all about getting your DZ 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.