New Brunswick Commercial Drivers License Air Brakes Practice Test 5

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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

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

A hearse

A pickup truck

A school bus

A compact car

2 / 20

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

413 kPa (60 psi)

380 kPa (55 psi)

551 kPa (80 psi)

242 kPs (35 psi)

3 / 20

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

32 kPa/minute

21 kPa/minute

38 kPa/minute

26 kPa/minute

4 / 20

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

2 minutes

5 minutes

10 minutes

1 minute

5 / 20

What is the service brake used for?

None of these

Drifting

Normal braking

Emergency braking

6 / 20

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

413 kPa (60 psi)

242 kPs (35 psi)

380 kPa (55 psi)

551 kPa (80 psi)

7 / 20

Spring brake controls are usually what color?

Orange

Yellow

Blue

Red

8 / 20

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

When going downhill

At all times

In city traffic

When traveling at high speed

9 / 20

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

414 kPa (60 psi)

514 kPa (74 psi)

690 kPa (100 psi)

242 kPa (35 psi)

10 / 20

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

Driving the speed limit

Exceeding the vehicles weight limit

Proper maintenance

Driving too slow

11 / 20

What is a "glad hand"?

The crank for the trailer legs

A coupling device

An emergency supply line

A dance move

12 / 20

The pushrod stroke occurs when compressed air enters the?

Supply tank

Engine block

Brake chamber

Air compressor

13 / 20

Cut in pressure level must never fall below __________.

345 kPa (50 psi)

413 kPa (60 psi)

551 kPa (80 psi)

690 kPa (100 psi)

14 / 20

When brakes become overheated they also become?

Extra efficient

None of the above

Very hot

Dangerously inefficient

15 / 20

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

26 kPa/minute

34 kPa/minute

32 kPa/minute

28 kPa/minute

16 / 20

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

413 kPa (60 psi)

551 kPa (80 psi)

380 kPa (55 psi)

242 kPs (35 psi)

17 / 20

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

Because it can be dangerous

So you're not suprised

Because you should know your truck

In case anyone ever asks

18 / 20

Cut out pressure level must never exceed __________.

1000 kPa (145 psi)

862 kPa (125 psi)

690 kPa (100 psi)

1138 kPa (165 psi)

19 / 20

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

Disconnected supply line

A broken air compressor

All of these

A hole in the supply line

20 / 20

The air system pressure range must be between _________.

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

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

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

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

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The average score is 82%

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.