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District of Columbia DC DMV CDL General Knowledge Practice Tests

The general knowledge test every commercial driver license applicant takes. Practice with 5 tests built like the real District of Columbia exam, then try the full simulation.

454 practice questions: District of Columbia law plus the rules that apply in every state.

A tree-lined avenue with classical white buildings and cherry blossoms, a typical landscape of the District of Columbia

Minimum age: 18 years for intrastate driving; 21 years for interstate driving

District of Columbia CDL practice tests

District of Columbia CDL exam simulator

Answer at your own pace. After each question you see the correct answer and why, and at the end a review of what you missed.

  • Random practice: 20 random questions; pass with 16 correct, the same ratio as the real test.
  • Exam simulation: 50 questions and a pass mark of 40, like the District of Columbia CDL test.

About the District of Columbia CDL test

DC DMV publishes a 90-minute limit for the CDL general knowledge test and 60 minutes for endorsement tests. The number of questions is not published; the value shown assumes the standard 50-question test scored at the federal 80 percent threshold and is listed as unconfirmed.