CDL Air Brakes Practice Test
Free Practice Test Questions & Answers
Air Brakes
Are you studying for the CDL Air Brakes Test to get your CLP? Our FREE CDL Air Brake practice test is designed to help aspiring truck drivers like yourself pass the Commercial Driver’s License written exams with confidence. These real Air Brakes questions you’ll see on the actual test come with the answers and explanations, so you’re fully prepared to pass!
This CDL knowledge test randomizes 80 real questions and answers you need to know. That means you can take this Air Brakes practice exam over and over.

Full Air Brakes Practice Test
Are you ready to pass the CDL permit exam?
25 Questions • Passing Score: 80%

Free CDL Air Brakes Practice Test
Prepare and Pass Your CDL Air Brake Exam with Confidence
Are you looking to pass your CDL Air Brakes Test? Of course you are! Our free CDL Air Brake practice test is designed to help aspiring truck drivers master the knowledge needed to operate tractor-trailers, buses and other large commercial vehicles safely and confidently.
This interactive quiz includes real CDL questions covering essential topics such as proper air pressure levels, vehicle inspections, braking techniques, and safe maintenance. Practicing with our test will make sure you’re fully prepared for the actual CDL Air Brakes exam at the DMV and in a successful career as a CDL driver.
Want more practice permit exams? Check out our Free General Knowledge CDL Practice Test.
CDL Air Brake Test Walkthrough
In this video, we walk you through updated Air Brake CDL questions and answers just like what you’d see on the real permit exam.
Not only will you learn the correct answers, but we’ll explain why they’re correct so you actually understand the material and are prepared to be a CDL licensed bus or truck driver.
Why Use Our Air Brakes Practice Written Test?
- Free and unlimited attempts to help you learn at your own pace
- Randomly selected sample questions to learn everything needed to pass
- Instant feedback and explanations for every question
- 80 questions focused on the CDL Air Brake permit exam topics
Why Driving Academy
- Flexible Hours (open 7 days a week)
- Payment Plans Available
- Lifetime Job Placement Program
- Road Test Vehicle Rentals Available
- Small Class Sizes
- State-of-the-Art Driving Simulator

Our Story
Driving Academy was established to create the best learning environment for all our students. Since driving is something we take very seriously. Our founder came from a family of teachers and professional CDL drivers. He has, practically, grown up in this business and, teaching and driving is in his blood. Our founder has developed a system of driver education that can help even the most challenged students. He has truly taken this industry by storm by putting fundamental education before anything else.
Getting a License is as easy as 1-2-3
1. Pick a license to freedom
CLASS A

CLASS B

CLASS B+P

2. Pick a course to freedom
Flexible training options: You can pick your schedule around your needs
Training Times: Monday – Friday 7:30 – 9:00pm, Saturday and Sunday 9:00am – 1pm (weekend hours subject to change)
Guaranteed Training Course
Unlimited Road Test Rentals
Both Classroom & Yard Training
Full Time Only
Full Course
(Both Classroom + Yard Training)
Half Course
Just Yard Training
Full Time
(8 Hours per day)
Part Time
(4 Hours per day)
3. Pass test and earn your license to freedom
Practice Test Questions & Answers
Air Brakes
We have provided more sample Air Brake question that might come up on your written exam. These are not all the questions that will be on the test. For more sample questions or access to our online training course give us a call today.
Hint: Correct answer is underlined.
A. 150 psi
B. 200 psi
C. 100 psi
D. 175 psi
A. when the brakes should be applied
B. when the air compressor pumps air into the storage tanks
C. when the warning light is activated
D. when the air is released from the tank
A. 125 psi
B. 200 psi
C. 225 psi
D. 175 psi
A. 200 psi
B. 100 psi
C. 150 psi
D. 125 psi
A. only on steep hills
B. on level surfaces
C. anytime you park
D. when the brakes are hot
A. air and water
B. oil and air
C. water and oil
D. dirt and oil
A. gears
B. hoses
C. V belt
D. both A and B
A. reduce the risk of ice in the air brake valve during cold weather
B. remove oil from the air lines
C. reduce the risk of water in the air brake valves in warm weather
D. remove fuel from the air lines
A. Once a week
B. Once a day
C. Every four hours
D. Every two or three days
A. the pressure has exceeded 150 psi
B. too much air is in the air compressor
C. something is wrong and you should have it checked by a mechanic
D. all of the above
A. are bolted to the vehicle
B. are located at each end of the vehicle’s axles
C. hold the brake shoes and linings
D. all of the above
A. Wedge brakes
B. Dish brakes
C. S-Cam brakes
D. Drum brakes
A. shows how much pressure you are applying to the brakes
B. is connected to the generator
C. releases air when you accelerate
D. prevents brake failure
A. pushing against a spring and against air pressure to the brake
B. releasing air pressure to the brake
C. reducing air in the tanks
D. activating the safety valve
A. a red light
B. a wig-wag mechanical arm
C. a buzzer
D. any one of the above

