New Brunswick Commercial Drivers License Air Brakes Practice Test 1

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New Brunswick Air Brakes Practice Test 1

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

1 / 20

Where are the vehicles air tanks located?

In the engine compartment

Underneath around the frame

Inside the wheel

In the cab of the vehicle

2 / 20

Most air brake systems will use automatic valves to?

Increase pressure at the front wheels

Reduce pressure at the back wheels

Increase pressure at the back wheels

Reduce pressure at the front wheels

3 / 20

How long should it take for the air pressure to rise from 587kPa to 690 kPa after the pressure had fallen below 552 kPa?

5 mins

1 min

4 mins

2 mins

4 / 20

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

Replace the line

Leave it alone, it's fine

Turn off your air brakes

Cover it with tape

5 / 20

You test a tractor protection valve by removing the service line and?

Starting the truck

Driving 150 metres

Switching the gears

Engaging the brake pedal

6 / 20

Why are their two service tanks?

For fuel economy

For safety

For efficiency

Incase you need more stopping power

7 / 20

Any commercial vehicle with air brakes must not lose system pressure with the brakes applied at a rate of more than?

21 kPa / minute

19 kPa / minute

50 kPa / minute

37 kPa / minute

8 / 20

When you are going twice the speed, your brakes will need to work ________ time harder to stop your vehicle.

Four

Two

Five

Three

9 / 20

Where are the air brake chambers located?

At each wheel

Near the compressor

At the front wheels

At the back wheels

10 / 20

When inspecting your brakes, you must?

Apply spring brakes

Drive the vehicle to level ground

Block the truck with wheel chocks

All of these

11 / 20

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

413 kPa (60 psi)

551 kPa (80 psi)

827 kPa (120 psi)

620 kPa (90 psi)

12 / 20

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

Both of these

A service brake priority trailer

None of these

A spring brake priority trailer

13 / 20

What is an ABS system?

Automatically brakes when needed

Prevents wheel lock

Reduces stopping distance

Increases braking power

14 / 20

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

800 to 1000 RPM

1000 to 2000 RPM

600 to 900 RPM

200 to 500 RPM

15 / 20

Spring brake controls are usually what color?

Blue

Red

Yellow

Orange

16 / 20

How much air loss is allowed for a tractor and a trailer when the brakes are engaged?

34 kPa/minute

26 kPa/minute

28 kPa/minute

32 kPa/minute

17 / 20

A commercial vehicle with air brakes engaged must not lose air pressure faster than?

21 kPa/minute

32 kPa/minute

38 kPa/minute

26 kPa/minute

18 / 20

Correct belt tension for an air compressor can be determined by

Firm hand pressure

A karate chop

Finger pressure

A tight squeeze of the hand

19 / 20

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

242 kPa (35 psi)

690 kPa (100 psi)

414 kPa (60 psi)

514 kPa (74 psi)

20 / 20

It is important to me to be home at a regular time and have a set schedule.

Yes

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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.