Your Progress

  • 0 Incorrect (6 allowed to pass)
  • 0 Correct
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
  • 0 Incorrect (6 allowed to pass)
  • 0 Correct
Restart
 
 
 
 
 
Ask DMV Genie AI
new
Back to Program Home

Free District of Columbia CDL Air Brakes Test (DC)

  • Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements
  • Based on 2024 DC commercial driver's license manual
  • Updated for July 2024
Verified by Steven Litvintchouk, M.S., Chief Educational Researcher, Member of ACES. See our detailed commitment to accuracy and quality in our practice tests.
Commercial Driver's License

About this test

9 min to complete
Available in EN and ES

The knowledge you have gained from studying air brakes will be tested so that you can become a safer driver today.

We have included 30 multiple-choice questions, carefully based on the District of Columbia Commercial Driver License Manual and the actual types of questions you will find on the DMV exam. A hint and an explanation have been provided for each question. Please read each explanation to gain further insight as you prepare for the questions on the actual DMV exam. Good luck on your exam, and drive safely!

To fully understand the Air Brakes endorsement process and to master the material for the written exam, explore our detailed guides on the Air Brake endorsement and the Air Brakes written test.

What to expect on the actual DC CDL exam

25

questions

20

correct answers to pass

80

passing score

Your trusted source for driver education

Experience the Driving-Tests difference
Since our foundation in 2010, Driving-Tests.org has led the way in online driver's education, with over a decade of experience. Our dedicated experts, bringing together more than 50 years of collective expertise, have established us as the largest non-governmental organization in the U.S. solely focused on driver education. We go beyond the official manuals, offering unique interactive experiences and support like audio guides and an AI Assistant, to cater to different learning styles and needs.
Helping hundreds of thousands to ace their tests, our resources have earned a 4.7-star rating from over 14,500 reviews. Our goal is to make your path to becoming a confident driver as straightforward and effective as possible.