MB Air Brake Test 9

You've reached Test 9, and by now, you should have a robust understanding of air brake systems. This 50-question test is designed to simulate the actual Manitoba Air Brake exam closely. Tailored to the 2025 MB commercial driver's manual, each question covers a vital aspect of air brakes, complete with explanations and hints. Consistent practice makes perfect; let's keep going.

Unlock full access with Premium

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

All 1,500+ exam-like questions specific to Manitoba

Interactive learning with AI personal tutor

Get your money back if you don’t pass

What you need to know

5 out of 5 • 2 votes

Verified by Steven Litvintchouk, M.S., Chief Educational Researcher, Member of ACES. See our detailed commitment to accuracy and quality in our practice tests.

What to expect on the official exam

questions

correct answers to pass

passing score

Helpful links

MB Driver and Vehicle Services

Official Manitoba driver's manual (2025)

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.

More resources

Are you in another province?

List of questions (classic view)

To test the low air-pressure warning device, lower the air pressure to about
On each end of a steering axle, should the distance between the center of the camshaft and the clevis pin always be the same?
Can varying patterns of holes on some models of slack adjusters result in different appearances on each end of an axle, even when they are correctly attached?
What is the air brake chamber size based on?
Which statement is incorrect? An inspection of the foundation brake components looks for
To start the test of the low air-pressure warning device, does the engine need to be running?
What is the purpose of including external reference points in brake-stroke indicators?
What type of defect is it if the vehicle does not pass the air-tank drain valves test?
Which of the following steps is not involved in testing tractor spring brakes?
What is the effect of brake wear on the brake pushrod stroke?
Which of the following is not a step in testing the air tank drain valves?
Closing the trailer air supply valve causes the trailer spring brakes to apply. Which of these can also cause this?
Is it necessary for drivers to be thoroughly trained on brake-stroke indicators?
Which step is not involved when testing for trailer spring brakes?
Which of the following steps is not involved in testing service brakes?
What issue is implied when oil is detected in any air tank other than the wet tank?
Which of the following is not a step in checking the operation of the governor?
What are the most obvious and lasting features used to identify long-stroke brake chambers?
Which air tank should always be emptied first to prevent the buildup of moisture?
What is not a step in testing the automatic application of the trailer spring brakes?
How often should the pushrod stroke be inspected to determine whether the brake adjustment is correct?
Where else can brake-stroke indicators be fitted?
Is it normal to discharge a significant quantity of moisture from the remaining air tanks, other than the supply tank?
If the vehicle does not pass the system air-loss rate test, when should it be repaired?
What step is not included in testing trailer service brakes?
What factor determines the variation in brake adjustment limits?
At what air pressure level should the brake adjustment be inspected?
Is it necessary to report a sudden increase in the amount of moisture or oil drained from any tank?
What is the most frequently used brake chamber size?
What's the maximum permissible air loss when testing system air-loss for a tractor and two or more trailers?
In order to test the trailer supply valve, which line should be disconnected?
How can brake application be confirmed when testing the automatic application of the trailer spring brakes?
What kind of a defect is present if the vehicle fails the test for measuring applied pushrod stroke?
Which of these statements about long-stroke brake chambers is FALSE?
What's the maximum permissible air loss when testing system air-loss for a tractor and trailer?
During the test of the tractor protection valve, the trailer supply valve must be
If the low-air warning device does not activate or activates under 55 psi, what kind of defect is it?
What must be demonstrated by a driver to achieve an S air brake endorsement?
If the pressure drop exceeds the value specified for the vehicle, what kind of defect is it?
When examining air lines for wear or damage, what is not a concern?
When testing the governor, the cut-out pressure is found to be below 120 psi. What kind of defect is this?
Upon determining the correct pushrod stroke, how far should the adjusting bolt be backed off?
Is brake adjustment inspection necessary regardless of the type of slack adjuster?
What type of defect can be observed when, during the governor operation inspection, the cut-in pressure is lower than 100 psi?
Is examining the applied pushrod stroke a dependable method for brake adjustment inspection?
Which of the following is not done when inspecting foundation brakes?
Which statement is not correct? When inspecting air compressors...
Should the brake chambers on the steering axle be of the same size?
What type of defect is noticed when the cut-out pressure is above 145 psi during the governor operation inspection?
What is not a defect when inspecting air compressors?