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

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

620 kPa (90 psi)

413 kPa (60 psi)

827 kPa (120 psi)

551 kPa (80 psi)

2 / 20

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

Three

Two

Five

Four

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?

2 mins

5 mins

4 mins

1 min

4 / 20

Correct belt tension for an air compressor can be determined by

Finger pressure

Firm hand pressure

A karate chop

A tight squeeze of the hand

5 / 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 back wheels

Increase pressure at the front wheels

6 / 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

37 kPa / minute

50 kPa / minute

7 / 20

Why are their two service tanks?

Incase you need more stopping power

For safety

For efficiency

For fuel economy

8 / 20

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

Yes

9 / 20

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

Both of these

None of these

A spring brake priority trailer

A service brake priority trailer

10 / 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

200 to 500 RPM

1000 to 2000 RPM

600 to 900 RPM

11 / 20

When inspecting your brakes, you must?

All of these

Apply spring brakes

Drive the vehicle to level ground

Block the truck with wheel chocks

12 / 20

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

Cover it with tape

Replace the line

Turn off your air brakes

Leave it alone, it's fine

13 / 20

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

690 kPa (100 psi)

414 kPa (60 psi)

242 kPa (35 psi)

514 kPa (74 psi)

14 / 20

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

26 kPa/minute

38 kPa/minute

32 kPa/minute

21 kPa/minute

15 / 20

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

34 kPa/minute

28 kPa/minute

32 kPa/minute

26 kPa/minute

16 / 20

Spring brake controls are usually what color?

Orange

Red

Blue

Yellow

17 / 20

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

Driving 150 metres

Engaging the brake pedal

Starting the truck

Switching the gears

18 / 20

Where are the air brake chambers located?

At each wheel

At the back wheels

Near the compressor

At the front wheels

19 / 20

Where are the vehicles air tanks located?

Underneath around the frame

In the cab of the vehicle

Inside the wheel

In the engine compartment

20 / 20

What is an ABS system?

Reduces stopping distance

Prevents wheel lock

Automatically brakes when needed

Increases braking power

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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.