Ontario Commercial Drivers License Class D Practice Test 4

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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 4

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

1 / 20

Test the low pressure alarm with the air pressure above __________.

827 kPa (120 psi)

413 kPa (60 psi)

551 kPa (80 psi)

620 kPa (90 psi)

2 / 20

What is the maximum width a commercial vehicle can be?

4 metres

2.6 metres

2 metres

1.8 metres

3 / 20

Cut out pressure level must never exceed __________.

1138 kPa (165 psi)

1000 kPa (145 psi)

690 kPa (100 psi)

862 kPa (125 psi)

4 / 20

Your truck or other commercial vehicle must be have?

Spare tires

Portable reflectors

Moving blankets

Water

5 / 20

What information does a CVOR record contain?

Driving record, company name, number of drivers

Driving record, criminal records, education levels, social insurance number

Safety rating, violations, convictions, and inspections

Safety training records for each driver, list of goods carried, name of CEO

6 / 20

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

10 times as much

6 times as much

3 times as much

2 times as much

7 / 20

Overheated brakes are?

Dangerously inefficient

Dangerously efficient

Normal

None of these

8 / 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

9 / 20

What does CVOR stand for?

Commercial Vehicle Odometer Reading

Commercial Vehicle Operators Registration

Carriage Vapour Oxygen Release

Commercial Vehicle Owners Registration

10 / 20

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

The first tank

Wheel bearings

Supply tank

The second tank

11 / 20

What does this yellow sign mean?

Snowmobile parking

Bike lanes ahead

Boat ramp up ahead

Snowmobiles cross this road

12 / 20

What do you do if you get stuck over railway tracks?

Remain in the vehicle and rock it back and forth

Get out of the vehicle and stand away from it and call the police

Call the police

Try to push the vehicle to safety

13 / 20

As a driver you are expected to practice _________?

Proper hygiene

On-time deliveries

Safe driving practices

Common sense

14 / 20

What does this arrow sign mean?

Right turn only

Traffic in one direction only

Through traffic only

Two-way traffic ahead

15 / 20

What does this black and white sign mean?

Yield the lane to oncoming traffic

The lane is only for right turns

Two-way traffic ahead

The lane is only for two-way left turns

16 / 20

Activation of trailer spring brakes can be checked by?

Rocking the truck back and forth

Applying slight engine power

Gunning it

Pulling the trailer air valve

17 / 20

What does this white sign with a "not permitted" cross mean?

Crosswalk up ahead

Pedestrians only, no cars

No pedestrians allowed on this road

Pedestrian crossing

18 / 20

System air loss should be measured by applying the brake for how long?

5 minutes

1 minute

2 minutes

10 minutes

19 / 20

Correct belt tension for an air compressor can be determined by

A karate chop

A tight squeeze of the hand

Finger pressure

Firm hand pressure

20 / 20

What does this yellow diamond sign mean?

Winding road up ahead

Pavement is slipper when wet

Bumpy pavement ahead

Water may be flowing over the road

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Your score is

The average score is 87%

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.