- Updated for January 2025
- Based on 2025 WV commercial driver's license manual
Free West Virginia CDL Air Brakes Test 2025
Today is your opportunity to not only become a safer commercial driver, but to also become a a more prepared and less restricted driver in the state of West Virginia. Having a West Virginia CDL that allows you drive vehicles with air brakes will broaden your options, and you will be able to drive a much wider range of commercial vehicles. This 30-question practice exam, which is written with information directly from the West Virginia DMV Commercial Driver’s License Manual, will allow you to learn the subject material, become a safer driver, and get familiar and comfortable with the exam format (multiple-choice). Soon, you will be receiving a passing score on your air brakes exam and you will be on your way to becoming a safer, more varied West Virginian CDL holder. Good luck and drive safely!
- 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 WV DMV exam
questions
correct answers to pass
passing score
Helpful links
List of questions (classic view)
- 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?
- At what measurement is the safety valve USUALLY set to open?
- How do brakes work on a long, steep downgrade?
- When should you drain your air tanks?
- 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?
- Which of the following should you do before leaving your vehicle unattended?
- Which of the following are true about a dual air brake system?
- How can you tell if your vehicle is equipped with an antilock braking system (ABS)?
- If the air tanks are not drained,
- Spring brakes are
- Which of the following is NOT part of the air brake system?
- What is the best way to test if your vehicle's spring brakes come on automatically?
- Slack adjusters are
- An antilock braking system (ABS)
- Which of the following is NOT part of the drum brake?
- What is the best way to test your vehicle's low air pressure warning signal?
- Which of the following can cause brakes to fade or fail?
- The purpose of a supply pressure gauge is
- The tractor protection valve
- Which vehicles must have low air pressure warning signals?
- Under which conditions are front wheel brakes good?
- After the initial drop, the maximum acceptable leakage rates per minute are
- Why must you pass a knowledge test on air brakes?
- 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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