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DC CDL Air Brakes Marathon

Ready for something a little different? This District of Columbia CDL Air Brakes Marathon is a monster of a study tool that contains a compilation of all 183 questions that we have available for this DC endorsement. If you give an incorrect answer, we’ll remember that question and will display it to you again at the end of the exam until you’ve answered that question correctly. In other words, the Marathon will cycle through your missed questions until you answer each one correctly. You must make a 100% to pass. We suggest you attempt this one after you have practiced the state’s “regular” tests, but before the “Exam”. Give it your best shot!

Perfect for

  • First-time DC CDL and CLP applicants
  • CDL holders adding endorsements
  • DC CDL renewal applicants
DC commercial driver's license

What to expect on the actual DC DMV exam

How many questions25
How many correct answers to pass20
Passing score80%

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Become a member to unlock our extensive library of 1,500+ exam-like questions and get your District of Columbia ELDT certification online. Official FMCSA-approved national Entry-Level Driver Training provider.

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More DC CDL Air Brakes Resources

Helpful resources

DC CDL Handbook

View the most recent (2024) official DC CDL Handbook.

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DC CDL Practice Test App

Download our free iOS or Android app and practice for your driving test offline or on the go.

CDL Genie app

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10 Things You Should Do Before Your Driving Knowledge Exam (PDF)