Quebec Commercial Drivers License Air Brakes Practice Test 3

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Quebec Air Brakes Practice Test 3

A 20 question practice test to help prepare you for your air brakes knowledge test in Quebec

1 / 20

What does a governor do in an air brake system?

Regulates the tire pressure

Limits the speed by using automatic braking

Regulates the air pressure

Tells the other brakes what do to

2 / 20

What powers the air brakes air compressor system?

The rotation of the wheels

The battery

Overhead wires

The trucks engine

3 / 20

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

Unbalanced braking

Unbalanced weight

Efficient stopping

More power than necessary

4 / 20

Why is it important to know where your air system releases air pressure from?

In case anyone ever asks

So you're not suprised

Because you should know your truck

Because it can be dangerous

5 / 20

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

Wheel bearings

Supply tank

The second tank

The first tank

6 / 20

You should be looking for this when checking your brake chambers?

Cracks or other damage

New holes from wear and tear

All of the below

Mismatched slack adjuster lengths

7 / 20

How do you engage the emergency / parking brake on most air brake systems?

Press down the pedal

Twist it to the right

Pull out the control

Twist it to the left

8 / 20

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

2 minutes

1 minute

10 minutes

5 minutes

9 / 20

Where is the brake lining fastened?

The brake shoe

The wheel well

The struts

The rim of the tire

10 / 20

Which statement is true of spring brakes?

They are as strong as service brakes

They are not as strong as service brakes

They are stronger than service brakes

They can be used in lieu of service brakes

11 / 20

What might happen if the air lines are cross connected?

Any of these

The service brakes will not function correctly

The spring brakes won't work

The towing vehicle will lose air

12 / 20

Spring brake controls are usually what color?

Yellow

Blue

Orange

Red

13 / 20

Activation of trailer spring brakes can be checked by?

Gunning it

Applying slight engine power

Rocking the truck back and forth

Pulling the trailer air valve

14 / 20

Manufactures recommend draining moisture and oil in an air system on a _______ basis.

Daily

Quarterly

Weekly

Monthly

15 / 20

Which type of trailer can be towed before the service tanks are full?

A spring brake priority trailer

Both of these

A service brake priority trailer

None of these

16 / 20

What is an ABS system?

Automatically brakes when needed

Prevents wheel lock

Reduces stopping distance

Increases braking power

17 / 20

Most air brake systems will use automatic valves to?

Reduce pressure at the back wheels

Reduce pressure at the front wheels

Increase pressure at the front wheels

Increase pressure at the back wheels

18 / 20

The air system pressure range must be between _________.

690 kPa (100 psi) and 1380 kPa (200 psi)

551 kPa (80 psi) and 1000 kPa (145 psi)

483 kPa (70 psi) and 1138 kPa (165 psi)

413 kPa (60 psi) and 828 kPa (120 psi)

19 / 20

Trailer air brake systems must apply a spring brake when the pressure drops below?

514 kPa (74 psi)

242 kPa (35 psi)

690 kPa (100 psi)

414 kPa (60 psi)

20 / 20

Where is the air pressure gauge for the air brake system?

Beside the air compressor

On the vehicle dashboard

On each wheels brake

Beside the supply tank

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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 the provinces or any test centres. 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.