Newfoundland Commercial Drivers License Air Brakes Practice Test 2

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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.

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Created by Commercial Driver HQ

Newfoundland Air Brakes Practice Test 2

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

1 / 20

What is the best way to inspect an air compressor?

2 / 20

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

3 / 20

When you are testing your spring brakes, the test is considered a success when?

4 / 20

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

5 / 20

Cut out pressure level must never exceed __________.

6 / 20

When inspecting an air brake system, the person inspecting should wear?

7 / 20

Which tank should be drained first when draining the air tanks on an air brake system?

8 / 20

Which colour represent the trailer supply line?

9 / 20

When brakes become overheated they also become?

10 / 20

What happens to the air valve when you press down the brake?

11 / 20

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

12 / 20

What is a "glad hand"?

13 / 20

The best way to reduce rough and abrupt braking is to?

14 / 20

Which colour usually means the air line is a service line?

15 / 20

How do you engage the emergency / parking brake on most air brake systems?

16 / 20

The supply tank should discharge more moisture than any other tank?

17 / 20

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

18 / 20

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

19 / 20

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

20 / 20

What powers the air brakes air compressor system?

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The average score is 73%


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.