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DC CDL General Knowledge Marathon
- Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements
- Based on 2025 DC commercial driver's license manual
- Triple-checked for accuracy
- Updated for May 2025
Ready for something a little different? This District of Columbia CDL General Knowledge Marathon is a super-challenging practice test that contains all 693 questions from our database for this DC endorsement. If you give an incorrect answer, we’ll remember that question and will display it to you again at the very end of the Marathon 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”. Delivers some serious studying power! Do your best to complete this mega test!
120 min to complete
Available in EN and ES
Ensuring the accuracy and quality of our program is paramount. Learn more about our rigorous standards in our Commitment to Accuracy article. 
Verified by Steven Litvintchouk,
Chief Educational Researcher, Member of ACES.
Chief Educational Researcher, Member of ACES.
This test is a Premium member exclusive. You'll get:
What to expect on the actual DC DMV exam
50
questions
40
correct answers to pass
80%
passing score
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