- Updated for March 2025
- Based on 2025 MI commercial driver's license manual
Free Michigan CDL Air Brakes Test 2025
Failure to pass the Michigan DOS CDL Air Brakes Knowledge Test means that your CDL will include the restriction “L.” This restriction will affect your job prospects by preventing you from operating commercial motor vehicles (CMVs) with air brakes. Failing the air brakes test in Michigan results in a one-day waiting period and a fee should you decide to retake the test. Our Michigan DOS CDL Air Brakes Practice Tests are your key to passing on the first attempt.
From its steep hills and sharp curves to its flat plains and forested areas, Michigan poses challenging driving conditions that demand the reliability of an air brake system. The coastal routes experience heavy fog, wind, and rain, which are compounded in winter when the snowy, icy roads make air brake proficiency essential for commercial drivers. Key transportation routes in the state include I-75 (a major north-south highway connecting Detroit to Canada), I-94 (an east-west corridor connecting Detroit to Chicago and the western U.S.), and US-23 (a north-south road passing through rural areas).
The Great Lakes State relies on drivers with the air brake qualification in such industries as automotive manufacturing (Detroit is the center of the U.S. auto industry), manufacturing and engineering, agriculture, and tourism (Great Lakes and Mackinac Island). Companies requiring air brake-qualified drivers include Con-way Freight and Ryder (both in Detroit) in the trucking industry and Greyhound Lines (Detroit) and Indian Trails (Owosso) in the charter bus sector. The state’s automotive industry includes companies like Ascent Global Logistics, Hollingsworth, and ICAT Logistics Detroit, which rely on air brake-equipped CMVs. Stoller Trucking, LLC, Brink Farms, and Willow Creek Trucking require the same in the agriculture sector. Michigan’s school districts use air brakes on their full-size buses providing hundreds of jobs. Since most semi-trucks, tractor-trailers, and commercial buses rely on air brakes for safe navigation, removing the air brake restriction from your CDL is crucial for these job opportunities.
The multiple-choice Air Brakes knowledge test is based on the state’s CDL manual (Michigan CDL Handbook 2025) and requires a minimum passing score of 80%. Our CDL Air Brakes Practice Tests fully prepare you for the official DOS Air Brakes Knowledge Test. You’ll receive instant feedback on all our Practice Test responses, and our tests mimic the official knowledge test. This method speeds learning and ensures you pass!
- Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements
- Triple-checked for accuracy
What you need to know
What to expect on the actual MI DOS exam
questions
correct answers to pass
passing score
List of questions (classic view)
- Which of the following will be true about your brake function if your anti-lock braking system (ABS) fails?
- Which vehicles must have low air pressure warning signals?
- Which of the following is NOT part of the drum brake?
- Which of the following are true about a dual air brake system?
- Which of the following can cause brakes to fade or fail?
- Spring brakes are
- How do brakes work on a long, steep downgrade?
- If the air tanks are not drained,
- What is the best way to test your vehicle's low air pressure warning signal?
- How do you check your truck's slack adjusters?
- After the initial drop, the maximum acceptable leakage rates per minute are
- How can you tell if your vehicle is equipped with an anti-lock braking system (ABS)?
- The purpose of a supply pressure gauge is
- At what measurement is the safety valve USUALLY set to open?
- Which of the following should you do before leaving your vehicle unattended?
- An anti-lock braking system (ABS)
- Why must you pass a knowledge test on air brakes?
- What is the best way to test if your vehicle's spring brakes come on automatically?
- When should you drain your air tanks?
- The tractor protection valve
- When should you use the parking brake?
- Which of the following is NOT part of the braking process when driving a tractor-trailer combination vehicle with an anti-lock braking system (ABS)?
- Under which conditions are front wheel brakes good?
- Slack adjusters are
- Which of the following is NOT part of the air brake system?
- The low air pressure warning signal will come on before the pressure in the air tanks falls below
- A low pressure warning signal is required on
- All vehicles equipped with air brakes have
- With air brake-equipped vehicles, the parking brakes should be used
- The use of air brakes on a downgrade is only a supplement to the
- Alabama: Test 1 / Test 2
- Alaska: Test 1 / Test 2
- Arizona: Test 1 / Test 2
- Arkansas: Test 1 / Test 2
- California: Test 1 / Test 2
- Colorado: Test 1 / Test 2
- Connecticut: Test 1 / Test 2
- Delaware: Test 1 / Test 2
- District of Columbia: Test 1 / Test 2
- Florida: Test 1 / Test 2
- Georgia: Test 1 / Test 2
- Hawaii: Test 1 / Test 2
- Idaho: Test 1 / Test 2
- Illinois: Test 1 / Test 2
- Indiana: Test 1 / Test 2
- Iowa: Test 1 / Test 2
- Kansas: Test 1 / Test 2
- Kentucky: Test 1 / Test 2
- Louisiana: Test 1 / Test 2
- Maine: Test 1 / Test 2
- Maryland: Test 1 / Test 2
- Massachusetts: Test 1 / Test 2
- Michigan: Test 1 / Test 2
- Minnesota: Test 1 / Test 2
- Mississippi: Test 1 / Test 2
- Missouri: Test 1 / Test 2
- Montana: Test 1 / Test 2
- Nebraska: Test 1 / Test 2
- Nevada: Test 1 / Test 2
- New Hampshire: Test 1 / Test 2
- New Jersey: Test 1 / Test 2
- New Mexico: Test 1 / Test 2
- New York: Test 1 / Test 2
- North Carolina: Test 1 / Test 2
- North Dakota: Test 1 / Test 2
- Ohio: Test 1 / Test 2
- Oklahoma: Test 1 / Test 2
- Oregon: Test 1 / Test 2
- Pennsylvania: Test 1 / Test 2
- Rhode Island: Test 1 / Test 2
- South Carolina: Test 1 / Test 2
- South Dakota: Test 1 / Test 2
- Tennessee: Test 1 / Test 2
- Texas: Test 1 / Test 2
- Utah: Test 1 / Test 2
- Vermont: Test 1 / Test 2
- Virginia: Test 1 / Test 2
- Washington: Test 1 / Test 2
- West Virginia: Test 1 / Test 2
- Wisconsin: Test 1 / Test 2
- Wyoming: Test 1 / Test 2
Your go-to, trusted source
Experience the Driving-Tests differenceOur 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.
At Driving-Tests.org, we understand the importance of reliable and accurate practice tests to help you prepare for your DMV 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 Manuals:
Every question we develop is based on the most recent version of each state's official driving manual. Our team regularly monitors each state DMV's 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 DMV 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 DMV 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 DMV exam.
Pass the First Time – Guaranteed
You’re moments away from your results.
Before you view them, see how 1.15 million drivers used Premium to pass faster.
Real Exam-Like Michigan Questions
Get all exam-like questions seen on the real test.
99.06% Pass Rate vs. 49% Average
Most Premium users pass on their first try.
Money-Back Guarantee
We stand behind you until you pass.
