Ontario Commercial Drivers License Class D Practice Test 5

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Commercial Driver HQ

Ontario Class D Practice Test 5

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

1 / 20

At vehicle inspection stations, axles are inspected for?

Spacing

All of these

Condition

Brand

2 / 20

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

Cover it with tape

Turn off your air brakes

Replace the line

Leave it alone, it's fine

3 / 20

What is the gross weight of your vehicle?

Weight of the driver

Weight of the vehicle itself

Weight of the load

Weight of the load and the vehicle

4 / 20

To measure the time it takes to build up pressure in the air system, the engine should be idling between _______________.

200 to 500 RPM

600 to 900 RPM

800 to 1000 RPM

1000 to 2000 RPM

5 / 20

What does this construction sign mean?

Grooves in the pavement ahead

Bumpy road ahead

Small cars only

Pavement ends ahead

6 / 20

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

242 kPs (35 psi)

380 kPa (55 psi)

551 kPa (80 psi)

413 kPa (60 psi)

7 / 20

How much space should you give a cyclist when you pass them?

2 metres

3 metres

Don't pass a cyclist

1 metre

8 / 20

Which of these vehicles would usually have an air brake system?

A compact car

A pickup truck

A hearse

A school bus

9 / 20

What does this orange sign mean?

Pavement ends ahead

Road is made of loose gravel

Military checkpoint

Road work begins ahead

10 / 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)

11 / 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 cut off the air compressor

The maximum speed the air brakes can stop at

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

12 / 20

What colour will the road generally look in the winter time?

Black and icy

Light grey with some white

None of these

Brown from the sand and salt

13 / 20

What does this yellow warning sign mean?

Fast speeds ahead

Wildlife reserve ahead

Zoo ahead

Deer crossing in this area

14 / 20

If you are driving through snow and you see blue flashing lights up ahead, what do you do?

Pull over becuase it is the police

Slow down as there is an accident up ahead

Speed up to pass the slow moving lights

The blue lights are a snow plow, prepare to slow down behind it

15 / 20

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

10 hours

7 hours

3 hours

12 hours

16 / 20

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

A Seven or twenty one day cycle

A seven or fourteen day cycle

A fourteen or twenty-one day cycle

A five or ten day cycle

17 / 20

What do these signs mean if you see a construction worker holding them up?

Crossing guard signs

Stop or slow down depending on which part of the sign is facing your vehicle

Stop or slow down, your choice

Stop slowing down

18 / 20

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

Tricks

Pivot

Spin

Rotate

19 / 20

What does this warning sign mean?

Do not enter

Hazard close to the edge of the road

Right lane ends ahead

Paved surface ends ahead

20 / 20

The tallest your vehicle can be is?

4.15 m

5.30 m

3.75 m

5.00 m

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The average score is 84%

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.