New Brunswick Commercial Drivers License Air Brakes Practice Test 4

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

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Created by Commercial Driver HQ

New Brunswick Air Brakes Practice Test 4

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

1 / 20

What is the most frequent reason a vehicle is removed from service?

2 / 20

What powers the air brakes air compressor system?

3 / 20

What might happen if the air lines are cross connected?

4 / 20

If brake chambers on opposite side of an axle are different sizes, this may cause?

5 / 20

Activation of trailer spring brakes can be checked by?

6 / 20

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

7 / 20

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

8 / 20

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

9 / 20

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

10 / 20

What is the best way to inspect an air compressor?

11 / 20

What function does the alcohol evaporator perform?

12 / 20

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

13 / 20

Where is the brake lining fastened?

14 / 20

When can you adjust your own air brakes?

15 / 20

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

16 / 20

To make sure the air tanks are securely attached to the vehicle you should?

17 / 20

Before inspecting for air brake chamber leaks, you must __________.

18 / 20

The spring brake is designed for which situation?

19 / 20

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

20 / 20

What is the first thing to look at when inspecting an air brake system?

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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.