Based on 2024 VT commercial driver's license manual
Free Vermont CDL Air Brakes Test 2024
Vermont is a tiny state, which is part of what makes trucking so important: it’s a pivotal part of ensuring goods reach everyone in the state. As a Vermonter and a truck driver, you are an important part of that process. Passing your air brakes exam allows you more options in your profession, so that you can drive a wider range of vehicle, with or without air brakes. The 30 multiple-choice questions on this practice test are designed to help you become comfortable and familiar with both the topics you will face and the format of the exam, since they are based closely on information straight from the Vermont CDL Manual. Study hard, practice here as often as you need to, and good luck on your exam!!
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.
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What is the best way to test if your vehicle's spring brakes come on automatically?
The purpose of a supply pressure gauge is
Slack adjusters are
Under which conditions are front wheel brakes good?
Which of the following is NOT part of the drum brake?
How can you tell if your vehicle is equipped with an antilock braking system (ABS)?
Which vehicles must have low air pressure warning signals?
Which of the following are true about a dual air brake system?
If the air tanks are not drained,
After the initial drop, the maximum acceptable leakage rates per minute are
Spring brakes are
The tractor protection valve
At what measurement is the safety valve USUALLY set to open?
When should you drain your air tanks?
How do brakes work on a long, steep downgrade?
An antilock braking system (ABS)
What is the best way to test your vehicle's low air pressure warning signal?
Which of the following will be true about your brake function if your antilock braking system (ABS) fails?
When should you use the parking brake?
Why must you pass a knowledge test on air brakes?
Which of the following is NOT part of the braking process when you're driving a tractor-trailer combination vehicle with an antilock braking system (ABS)?
How would you check your truck's slack adjusters?
Which of the following should you do before leaving your vehicle unattended?
Which of the following can cause brakes to fade or fail?
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
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Written by Andrei ZakhareuskiUpdated over a week ago
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