- Updated for January 2025
- Based on 2025 TN commercial driver's license manual
Free Tennessee CDL Air Brakes Test 2025
It isn’t difficult to pass the Tennessee CDL air brake exam as long as you practice early and often, which is where practice exams enter the picture. They can help you prepare for your real exam by making you comfortable with the subject matter, the exam format, and even allowing you to time yourself so that you get used to “test day” pressure. The practice exam features 30 questions written with information and questions directly from the Tennessee Commercial Driver License Manual. Each question has a hint that you can use if you need it. Explanations are also provided. You should read each of them as they can provide helpful information for the future, that could pop up on your real CDL air brake exam. Practice until you achieve a score that you feel confident in, and good luck on the road to safer air brake driving in Tennessee!
- 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 TN DMV exam
questions
correct answers to pass
passing score
Helpful links
List of questions (classic view)
- How can you tell if your vehicle is equipped with an antilock braking system (ABS)?
- 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)?
- Which of the following can cause brakes to fade or fail?
- Which of the following should you do before leaving your vehicle unattended?
- If the air tanks are not drained,
- Why must you pass a knowledge test on air brakes?
- When should you drain your air tanks?
- Under which conditions are front wheel brakes good?
- Spring brakes are
- The tractor protection valve
- Which of the following will be true about your brake function if your antilock braking system (ABS) fails?
- How would you check your truck's slack adjusters?
- After the initial drop, the maximum acceptable leakage rates per minute are
- Which vehicles must have low air pressure warning signals?
- An antilock braking system (ABS)
- Slack adjusters are
- At what measurement is the safety valve USUALLY set to open?
- The purpose of a supply pressure gauge is
- What is the best way to test your vehicle's low air pressure warning signal?
- What is the best way to test if your vehicle's spring brakes come on automatically?
- How do brakes work on a long, steep downgrade?
- When should you use the parking brake?
- Which of the following is NOT part of the drum brake?
- Which of the following is NOT part of the air brake system?
- Which of the following are true about a dual 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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Here's an inside look at how we maintain the highest quality in our practice tests.
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Every question we develop is based on the most recent version of each state's official driving manual. Our team regularly monitors each state DMV's website for the latest updates to ensure our practice tests are always aligned with the most current information. - Community Feedback Integration:
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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In line with our commitment to accuracy, we quickly update our practice questions to reflect any changes in the DMV manuals. Additionally, we update the free electronic copy of the state's driver's license manuals on our site, typically within a few days after the DMV publishes them.
Our thorough quality control process ensures that you have access to practice tests that are as accurate and up-to-date as possible. We believe in the power of well-prepared drivers and are dedicated to providing you with the best study tools to help you succeed on your DMV exam.
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