BC 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 British Columbia 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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Helpful links

BC Driver and Vehicle Services

Official British Columbia 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.
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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.
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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)

How can you determine applied pushrod stroke?
Which is least likely to cause brake drums to overheat?
When must full braking capability be available?
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 automatic 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
Under British Columbia law, how often must air brakes be inspected?
If you uncouple and park an old, single-circuit trailer, you should do which of the following?
When are you required to complete a pre-hill inspection?
As air pressure builds during your pre-trip inspection of the air brakes, the low air pressure warning device should deactivate at
While you're charging the trailer braking system, you find that the trailer brakes do not release. What are some possible causes?
If you're using the pry method during your pre-trip inspection, pushrod travel must not exceed
When brake drums overheat,
When should you adjust an automatic slack adjuster?
Where would an air dryer be installed in an air brake system?
For large commercial vehicles, which of the following are advantages of air brakes as compared with hydraulic brakes?
Why are drivers required to complete a trip inspection report?
Why is it important for you to check the slack adjusters?
Compounding the air brakes can
In a tractor-trailer, the air pressure present in the service (control) line equals
What is the maximum available pushrod stroke of a typical Type 30 brake chamber?
When draining the air tanks, you observe excessive oil coming out of the supply tank. Which of the following is most likely to be faulty?
You can usually make a normal stop by applying no more than
The coil spring in most spring parking brake chambers can exert a force of
Spring parking brakes typically require air pressures of at least _______ to completely release.
In the air service circuit, there is a double (two-way) check valve connected to the primary and secondary service tanks. What does this valve do?
In which of the following situations should a spring parking brake chamber be caged?
In a tractor-trailer, an anti-compounding valve is connected to
In Canada, automatic slack adjusters have been installed on trucks and trailers manufactured since
When you use the free stroke (pry bar) method, the pushrod should not move more than
In Canada, antilock braking systems (ABS) have been mandatory on all trucks and buses over 4,560 kg that have been manufactured since