- 0 Incorrect (6 allowed to pass)
- 0 Correct
- Updated for February 2025
- Based on 2025 MN commercial driver's license manual
Free Minnesota CDL Air Brakes Test 2025
Without passing the Minnesota DVS CDL Air Brakes Knowledge Test, your CDL will include the restriction “L,” preventing you from operating commercial motor vehicles (CMVs) with air brakes. Failing the air brakes test in Minnesota results in a one-day waiting period and a retest fee should you decide to retake the test. But don’t worry! We have designed our Minnesota DVS CDL Air Brakes Practice Tests to help you pass your knowledge exam on the first attempt.
Securing a CDL without an air brake restriction is essential for opening countless job opportunities in Minnesota. Most semi-trucks and tractor-trailers rely on air brakes for safe navigation. From the flat plains and rolling hills to the rugged and hilly roads in the Iron Range and North Shore, the state’s varied terrain presents unique challenges that often require air brakes. Winter weather conditions with ice and snow demand precise braking on the state’s steep roads. Key transportation routes like I-35 (connecting Duluth and Minneapolis-St. Paul), I-94 (the major east-west route for transport), and Route 2 and Highway 61 (hilly Lake Superior shoreline with sharp curves) require air brake-qualified drivers. The restriction “L” severely limits your job opportunities in the transportation industry.
The Land of 10,000 Lakes relies on drivers with the air brake qualification in key industries, including agriculture, mining (the Iron Range), and logistics and manufacturing (3M, Target). Other major companies requiring this qualification include Anderson Trucking Service (St. Cloud), C.H. Robinson (Eden Prairie), and TMC Transportation (Minneapolis) in the logistics sector, as well as Metro Transit (Twin Cities) and Jefferson Lines (Minneapolis and Duluth) in the public transit and charter services industry. The mining and forestry industry also requires air brake-qualified drivers, especially in northern Minnesota. The “L” restriction disqualifies you from these and many other jobs.
Our CDL Air Brakes Practice Tests cover all essential knowledge for the official DVS Air Brakes Knowledge Test. You will learn information that is also useful as you practice inspecting and operating CMVs to pass your skills test. The written Air Brakes knowledge test features multiple-choice questions based on the state’s CDL manual (Minnesota CDL Handbook 2025) and requires a score of at least 80% to pass.
Our Practice Tests mimic the official knowledge test and offer immediate feedback on all responses. This scientifically proven approach dramatically speeds learning and ensures you pass the knowledge test.
- 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 MN DVS exam
questions
correct answers to pass
passing score
List of questions (classic view)
- Which of the following is NOT part of the drum brake?
- What is the best way to test if your vehicle's spring brakes come on automatically?
- If the air tanks are not drained,
- 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)?
- Which vehicles must have low air pressure warning signals?
- When should you use the parking brake?
- Slack adjusters are
- At what measurement is the safety valve USUALLY set to open?
- Under which conditions are front wheel brakes good?
- Which of the following should you do before leaving your vehicle unattended?
- Which of the following is NOT part of the air brake system?
- Which of the following are true about a dual air brake system?
- Why must you pass a knowledge test on air brakes?
- How can you tell if your vehicle is equipped with an anti-lock braking system (ABS)?
- What is the best way to test your vehicle's low air pressure warning signal?
- An anti-lock braking system (ABS)
- The purpose of a supply pressure gauge is
- Which of the following can cause brakes to fade or fail?
- Which of the following will be true about your brake function if your anti-lock braking system (ABS) fails?
- After the initial drop, the maximum acceptable leakage rates per minute are
- The tractor protection valve
- When should you drain your air tanks?
- How do brakes work on a long, steep downgrade?
- How do you check your truck's slack adjusters?
- Spring brakes are
- 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
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