- Based on 2025 MB commercial driver's licence manual
- Updated for January 2025
MB Air Brake Test 7
You're making progress, and that's commendable. In the trucking world, the Air Brake endorsement is not just a certificate—it's a testament to your dedication to road safety and skill. This 50-question practice test will further refine your understanding of air brake systems as outlined in the 2025 Manitoba commercial driver's manual. Each question is crafted to cover essential aspects of air brakes, and you'll find detailed explanations to fortify your learning. Keep it up; you're well on your way to mastery.
- Perfect for first-time and renewal commercial applicants, and those adding endorsements
- Triple-checked for accuracy
This test is a Premium member exclusive. You'll get
What you need to know
Verified by Steven Litvintchouk, M.S., Chief Educational Researcher, Member of ACES. See our detailed commitment to accuracy and quality in our practice tests.
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What to expect on the official exam
50
questions
40
correct answers to pass
80
passing score
Our commitment to accuracy and quality in our practice tests
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.
Content Creation and Verification Process
- 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. - Rigorous Review Process:
Once Steven has finalized a set of questions, our team conducts a joint review session. This second level of scrutiny involves content accuracy, proofreading, and fact-checking to eliminate any errors. - User Feedback Mechanism:
After a question goes live on our site, we keep the lines of communication open. Each question features a feedback button, inviting users to report any issues or errors. This continuous feedback loop allows us to address and rectify any concerns promptly. - Responsive Updates:
In line with our commitment to accuracy, we quickly update our practice questions to reflect any changes in the provincial government manuals. Additionally, we update the free electronic copy of the state's driver's license manuals on our site, typically within a few days after the government publishes them.
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)
- What does a service brake chamber typically not contain?
- Who has the necessary qualifications to adjust automatic slack adjusters?
- How do spring brake chambers typically apply the brakes?
- What happens if stroke surpasses the adjustment limits of a brake chamber?
- What holds together most commercial vehicles' brake chambers?
- To release the spring brakes, the spring brake chamber must receive the requisite air pressure to compress the spring. At what psi is this typically accomplished?
- What is an alternate term for the action of compressing the spring?
- What are the two types of air brake chambers?
- Compressed air can exhaust at all these places EXCEPT
- Is it acceptable for the pushrod stroke to go beyond the adjustment limit?
- Why is it possible to continue driving even when the spring brakes are applied?
- What results when you press the brake pedal, and compressed air inflates the service brake chamber?
- What does 'stroke length' typically refer to?
- What is the component that links the brake chamber's pushrod to the brake assembly?
- Under which circumstances are spring brakes designed to activate?
- Compressed air is converted into...?
- At what psi does the spring brake control valve react due to a decrease in air brake system pressure?
- What equipment is used on service and supply lines to avoid air leakages when they are not being used?
- Assuming red is reserved for the supply line according to the colour-coding adopted during manufacturing of trailer couplers, what colour represents the service line?
- How do you control the trailer supply valve to provide air to the trailer?
- Is it possible to tow trailers with spring brake priority even before the service brake air tanks are filled?
- What is the consequence of the driver neglecting to close the trailer supply valve when a trailer is not attached?
- What is the main function of the supply line?
- Does a converter dolly that connects one trailer to another have a brake system essentially identical to a trailer system?
- What is another term for trailer couplers?
- Should trailer hand valves be utilized for parking or emergency stops?
- Does the air brake system on a trailer come with air tanks and automatic spring brakes?
- Cross-connecting the service and supply lines on a combination vehicle could cause all of the following EXCEPT
- Which component is not a part of the internal structure of s-cam brakes?
- What is the first action performed by trailers with service brake priority?
- Should towing vehicles designed for pulling trailers be equipped with special valves used only for the trailer?
- Once the trailer air supply valve is closed, the tractor protection valve in the tractor also closes. What impact does this have?
- The trailer supply valve closes automatically when the air pressure in the trailer supply line falls to approximately how many psi?
- What is the most prevalent type of foundation brake found on commercial vehicles with air brake systems?
- What is the main function of trailer couplers or 'gladhands'?
- What reduces the effectiveness of both the service brakes and spring brakes to halt or hold a vehicle?
- Which of the following are types of foundation brakes?
- Most towing vehicles are equipped with 'dead end' or 'dummy' couplers. What is their purpose?
- What is one way to prevent accidentally cross-connecting the lines?
- What is the primary role of the service line?
- Which type of chamber is used on some buses and motor coaches, instead of a large spring in the brake chamber?
- Why can't the components within the wheel on the S-cam brakes easily be seen?
- What is another term for the supply line?
- In an emergency when the trailer service brakes fail, how can the trailer spring brakes be applied?
- Why are the brake-assembly components at the wheels of a vehicle generally referred to as the foundation components?
- Which of the following can lead to a rapid drop in air pressure?
- To what component of the air-brake system is the brake lining attached?
- All these people EXCEPT ________ are responsible for ensuring a vehicle adheres to HIghway Traffic Act (HTA) regulations.
- Brake lining is considered defective if it is
- What does the term "brake fade" refer to?