Ontario Commercial Drivers License Class A Practice Test 4

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Class A Ontario Practice Test 4

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

1 / 20

What is a requirement on your daily log?

Odometer reading

All of these

Driver name

Date

2 / 20

If brake chambers on opposite side of an axle are different sizes, this may cause?

Unbalanced braking

Efficient stopping

More power than necessary

Unbalanced weight

3 / 20

Which valves are the tractor protection system?

The trailer supply valve and the hand valve

The trailer supply valve and the relay emergency valve

The trailer supply valve and the foot valve

The trailer supply valve and the tractor protection valve

4 / 20

What does this sign mean?

Winding road ahead

Swerving up ahead is dangerous

Snakes ahead

Slippery road ahead

5 / 20

When performing a normal stop, how should you press the brake pedal?

Steady pressure at the beginning, ease as the vehicle slows

Apply a little bit at a time until the vehicle stops

Slowly with light pressure

As hard as possible at first and then pump the brakes

6 / 20

When approaching a school bus, you must stop when?

The bus is operating its alternating red lights

If it is at a crosswalk

Only when behind the bus

If there is a stop sign

7 / 20

Don't use the differential lock when __________?

Carrying a load

The vehicle is stopped

The wheels are spinning

The wheels are different

8 / 20

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

13 hours

3 hours

10 hours

7 hours

9 / 20

After disconnecting from a trailer, a driver should?

Make sure the trailer brakes are applied

Both A and B

Block the wheels with wheel chocks

Lower the landing gear

10 / 20

This yellow sign with the swerving car means what?

Pavement is slippery when wet

Snowfall up ahead

Watch for volcanic ash

Falling rocks near wet pavement

11 / 20

What does this red sign mean?

Stop up ahead

Stop only if other vehicles approaching

Rolling stop

Come to a complete stop

12 / 20

The supply tank should discharge more moisture than any other tank?

True

False

13 / 20

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

In residential areas only

Anytime

During the day

School hours

14 / 20

After an inspection you find major defects in some parts, what do you do?

Fix only the minor defects

Repair the defects immediately

Note the defects in your log

Fix what you can yourself

15 / 20

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

551 kPa (80 psi)

827 kPa (120 psi)

413 kPa (60 psi)

620 kPa (90 psi)

16 / 20

Before driving down a grade (hill), you should?

Pick up some speed

Choose an appropriate gear

Honk your horn

Check your mirror

17 / 20

What does this square sign mean?

No stop signs in this area

No standing

No entry in this intersection

Do not stop between the signs

18 / 20

Who can install and repair wheels and tires?

A monkey

Anyone

A doctor

A qualified professional

19 / 20

How do you fix a leaky glad hand?

Inspect the seal for dirt and grit and replace if necessary

Swap the service and supply lines

Tape the seal with duct tape

Lower pressure in the sytem

20 / 20

When inspecting your brakes, you must?

All of these

Drive the vehicle to level ground

Apply spring brakes

Block the truck with wheel chocks

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The average score is 89%

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

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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.