- Updated for January 2025
- Based on 2025 NH commercial driver's license manual
Free New Hampshire CDL Air Brakes Test 2025
Today, you will have the opportunity to expand your New Hampshire CDL by practicing to achieve your air brake qualification. Currently, you may or may not have your CDL, and you intend you get your air brake qualification while getting it, or you may have a restriction and intend to get it removed. No matter what the situation, this practice exam will prepare you to get a great score. The 30 multiple-choice questions is based on those written in the New Hampshire CDL Driver’s Guide. Read the explanation accompanying each question closely, and come back to practice as often as you need to until you feel comfortable with the information, format, and time limits. Soon, you will be ready to pass your New Hampshire air brake exam and become a safer CDL driver!
- 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 NH DMV exam
questions
correct answers to pass
passing score
Helpful links
List of questions (classic view)
- The purpose of a supply pressure gauge is
- Why must you pass a knowledge test on air brakes?
- The tractor protection valve
- Which of the following is NOT part of the braking process when you're driving a tractor-trailer combination vehicle with an anti-lock braking system (ABS)?
- How do brakes work on a long, steep downgrade?
- Which vehicles must have low air pressure warning signals?
- Which of the following can cause brakes to fade or fail?
- When should you drain your air tanks?
- How would you check your truck's slack adjusters?
- If the air tanks are not drained,
- Which of the following will be true about your brake function if your anti-lock braking system (ABS) fails?
- An anti-lock braking system (ABS)
- Which of the following are true about a dual air brake system?
- What is the best way to test if your vehicle's spring brakes come on automatically?
- Which of the following is NOT part of the drum brake?
- At what measurement is the safety valve USUALLY set to open?
- Which of the following is NOT part of the air brake system?
- How can you tell if your vehicle is equipped with an anti-lock braking system (ABS)?
- When should you use the parking brake?
- Which of the following should you do before leaving your vehicle unattended?
- Slack adjusters are
- After the initial drop, the maximum acceptable leakage rates per minute are
- What is the best way to test your vehicle's low air pressure warning signal?
- Spring brakes are
- Under which conditions are front wheel brakes good?
- 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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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:
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