Free Minnesota CDL Air Brakes Test 2024

Today, you will have an opportunity to become a safer commercial driver and get one step closer to a less restricted CDL in the state of Minnesota. In order to have CDL without an air brakes restriction, you must correctly answer exam questions about air brakes. This practice exam, based closely on questions directly from the Minnesota Commercial Driver’s Manual, will allow you become comfortable with both the format of the exam (multiple-choice) and the subject matter, through answering questions and reading each explanation that comes with the questions. Soon, you will be able to receive the score that you want on your air brakes exam and you’ll be a safer, less limited Minnesotan commercial driver. Good luck!

Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements
Triple-checked for accuracy

What you need to know

9 min to complete

Available in EN and ES

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 actual MN DVS exam

questions

correct answers to pass

80%

passing score

Helpful links

MN DMV website

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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