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DC CDL Air Brakes Marathon

What to expect on the actual DC CDL exam

  • 25questions
  • 20correct answers to pass
  • 80%passing score

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!

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DC commercial driver's license

Perfect for

  • First-time DC CDL and CLP applicants
  • CDL holders adding endorsements
  • DC CDL renewal applicants

Helpful resources

DC CDL Handbook

View the most recent (2023) 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.

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

Many people do their best but still get to the DMV overconfident and underprepared because they fail to do some of the simple...

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DC commercial driver's license

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