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Free Colorado CDL Air Brakes Test (CO)

  • Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements
  • Based on 2024 CO commercial driver's license manual
  • Updated for April 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.

About this test

9 min to complete
Available in EN and ES

Your knowledge of air brakes will be tested with 30 multiple-choice questions that will make you more prepared for your upcoming DMV exam, and help you to become a safer driver.

Each question is based on information you can find in the Colorado Commercial Driver License Driver Manual and applicable Colorado laws. We recommend reviewing the explanation that accompanies each question so that you will be prepared to answer future questions about the material covered in this practice exam.

Good luck, practice until you feel confident, 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 CO CDL exam

25

questions

20

correct answers to pass

80

passing score

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