New Brunswick Commercial Drivers License Air Brakes Practice Test 5

Commercial Driver HQ is a website focused on helping new commercial drivers in all provinces and territories in Canada.

Our FREE practice tests are designed to help you succeed when it comes time to write the real test.

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.

Compatible on desktop, mobile, and tablet, you can take these tests anywhere you have internet access.

Take the practice test!

Created by

Commercial Driver HQ

New Brunswick Air Brakes Practice Test 5

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

1 / 20

The pushrod stroke occurs when compressed air enters the?

Supply tank

Air compressor

Engine block

Brake chamber

2 / 20

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

514 kPa (74 psi)

690 kPa (100 psi)

414 kPa (60 psi)

242 kPa (35 psi)

3 / 20

The low air pressure warning device needs to be replaced or adjusted if it does not trigger at a minimum level of?

380 kPa (55 psi)

413 kPa (60 psi)

551 kPa (80 psi)

242 kPs (35 psi)

4 / 20

A warning system must alert the driver when the pressure drops below?

380 kPa (55 psi)

413 kPa (60 psi)

551 kPa (80 psi)

242 kPs (35 psi)

5 / 20

Spring brake controls are usually what color?

Blue

Orange

Red

Yellow

6 / 20

The full capacity of the air brake system must be available when?

At all times

In city traffic

When going downhill

When traveling at high speed

7 / 20

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

In case anyone ever asks

Because you should know your truck

Because it can be dangerous

So you're not suprised

8 / 20

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

5 minutes

2 minutes

10 minutes

1 minute

9 / 20

Cut in pressure level must never fall below __________.

345 kPa (50 psi)

690 kPa (100 psi)

551 kPa (80 psi)

413 kPa (60 psi)

10 / 20

Cut out pressure level must never exceed __________.

1138 kPa (165 psi)

862 kPa (125 psi)

1000 kPa (145 psi)

690 kPa (100 psi)

11 / 20

Which of these vehicles would usually have an air brake system?

A school bus

A compact car

A hearse

A pickup truck

12 / 20

When brakes become overheated they also become?

Extra efficient

None of the above

Dangerously inefficient

Very hot

13 / 20

What is a "glad hand"?

A coupling device

An emergency supply line

The crank for the trailer legs

A dance move

14 / 20

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

38 kPa/minute

26 kPa/minute

32 kPa/minute

21 kPa/minute

15 / 20

What is the service brake used for?

Emergency braking

Normal braking

None of these

Drifting

16 / 20

Spring brakes will begin to apply when the pressure starts to drop below?

242 kPs (35 psi)

380 kPa (55 psi)

551 kPa (80 psi)

413 kPa (60 psi)

17 / 20

The air system pressure range must be between _________.

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

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

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

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

18 / 20

Doing this will put unnecessary strain on your vehicles braking system.

Driving too slow

Proper maintenance

Exceeding the vehicles weight limit

Driving the speed limit

19 / 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

20 / 20

What can cause the air pressure in the air brake system to drop?

Disconnected supply line

All of these

A broken air compressor

A hole in the supply line

Thanks for taking the practice test!

Enter your info to sign up for our mailing list or click "See Result" to move on.

NameEmail

Your score is

The average score is 84%

More New Brunswick Commercial Driving Practice Tests

New Brunswick Class 1 Practice Tests

New Brunswick Class 3 Practice Tests

New Brunswick Class 4 Practice Tests

Air Brakes Practice Tests

New Brunswick 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 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.