Newfoundland Commercial Drivers License Air Brakes Practice Test 3

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Newfoundland Air Brakes Practice Test 3

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

1 / 20

What should you do when the air brakes low pressure warning comes on?

2 / 20

Cut in pressure level must never fall below __________.

3 / 20

Activation of trailer spring brakes can be checked by?

4 / 20

Why are their two service tanks?

5 / 20

Where are the vehicles air tanks located?

6 / 20

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

7 / 20

What is the "cut-out" level?

8 / 20

Spring brake controls are usually what color?

9 / 20

What does a governor do in an air brake system?

10 / 20

A vehicle should have wheel chocks or blocks securing it in place during inspection if...?

11 / 20

Th design of the wedge brake system allows them to?

12 / 20

Most air brake systems will use automatic valves to?

13 / 20

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

14 / 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?

15 / 20

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

16 / 20

When inspecting your brakes, you must?

17 / 20

What is the service brake used for?

18 / 20

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

19 / 20

Which of these significantly decreases the brake force produced at the wheel?

20 / 20

Who can perform adjustments and maintenance on your air brake system?

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The average score is 67%


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.