NL Air Brake Test 5

If you’re looking for a job in the trucking industry, completing the mandatory commercial driver’s licence knowledge exam is the first step towards achieving your dream. We have developed this 50-question Air Brake practice test to help you prepare for the province’s examination (also known as the Newfoundland and Labrador trucking exam). Regardless of your current level of knowledge, this test will help you brush up on some important rules. You will likely perform better on the written test if you have been studying for it, so this is why it is so important to maintain your studying regiment. Know the rules, and the road will be a much safer place. Scroll down to begin the test.

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correct answers to pass

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NL Driver and Vehicle Services

Official Newfoundland and Labrador driver's manual (2025)

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Explore our rigorous, multi-tiered verification process that ensures each question mirrors the official manual for unparalleled accuracy.

Written by Andrei Zakhareuski Updated over a week ago

At Tests.ca, we understand the importance of reliable and accurate practice tests to help you prepare for your driver's knowledge exam. That's why we've developed a meticulous process to create and continually update our practice questions, ensuring they reflect the most current driving laws and regulations.

Here's an inside look at how we maintain the highest quality in our practice tests.

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Alignment with Official Driving Handbooks:
Every question we develop is based on the most recent version of each province's official driving manual. Our team regularly monitors each province's official website for the latest updates to ensure our practice tests are always aligned with the most current information.
Community Feedback Integration:
We leverage feedback from our vast community of users to understand which topics are most frequently tested. This helps us focus on the areas that are most relevant and beneficial for your preparation.
Expert Content Creation:
Our in-house editor, Steven, who has extensive experience in driver education, crafts each question with precision. He conducts a thorough review of each question against the official manuals to ensure accuracy.
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Our thorough quality control process ensures that you have access to practice tests that are as accurate and up-to-date as possible. We believe in the power of well-prepared drivers and are dedicated to providing you with the best study tools to help you succeed on your driver's knowledge exam.

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List of questions (classic view)

Assuming good traction and constant vehicle weight, if you double your vehicle's speed, your vehicle's braking distance will be
Which of the following is an advantage of wedge brakes over S-cam drum brakes?
Assuming good traction and constant vehicle speed, if you double your vehicle's weight, your vehicle's braking distance will be
When inspecting air brakes, you should wear
For inspecting the air brakes, when should you chock the wheels?
How can manual slack adjusters be adjusted?
How should you test the spring brakes?
Brake chambers of size 36 are marked with
__________________are conected to the brake spider in "S" cam brake system.
Automatic slack adjusters must be inspected
Which of the following is most likely to have air brakes?
It is preferable to test the brakes of towing vehicle with
An antilock braking system (ABS)
What to do when low air warning device activates on the road?
The spring brakes are for
Who can adjust the air brakes?
How can you make sure that each air tank is securely attached to the vehicle?
What does caging a brake chamber do?
On a tractor-trailer, the red dashboard knob controls the spring brakes on __________, and the yellow dashboard knob controls the spring brakes on _________.
Brakes are designed to withstand temperatures of up to
DD3 safety actuators are mostly found in
Trailer hand valve located on the tractor dashboard used to apply
Which of the following is not a part of a braking system?
How many airlines go to DD3 safety actuator brake chamber?
Easiest way to test trailer`s spring brakes is
Which of the following is most likely to lead to brake fade?
When inspecting the air brake chambers, what should you look for?
Brake fade can lead to
Under the Ontario Highway Traffic Act, how often must air brakes be inspected?
To test the trailer's service brakes independently of the tractor's service brakes, what should you do?
When inspecting the brake drums, you should look for
If the low air pressure warning activates, you should
To inspect an air brake system, you should wear
The best way to reduce rough and abrupt braking is to
What are the service brakes used for?
Manufacturers recommend draining moisture and oil in an air brake system on a _______ basis.
What is the "cut-out" level?
What happens to the foot valve when you press down on the brake pedal?
Why is it important to know which parts of the air brake system exhaust air?
Which of these can strain your vehicle's braking system?
What powers the air compressor?
Which of these can contaminate a brake system's air lines?
When brakes generate heat, where does this heat eventually go?
Which component controls when the compressor pumps air by monitoring the minimum and maximum air pressure in the system?
What does the friction between brake drums and linings produce in a braking system?
What is the determining factor for the amount of heat the brake drums can absorb?
What does the term loading stage signify in an air brake system?
Why is the sensation different when operating air treadles compared to hydraulic brakes?
What is the consequence of not maintaining slack adjusters within their specified limits?
What are the alternate names for the primary and secondary reservoirs in an air brake system?
What accumulates at the bottom of the supply reservoir in an air brake system?