FREE DC CDL Double/Triple Trailers Marathon

DC commercial driver's license
District of Columbia Commercial Driver's License.

Ready for a challenge? This District of Columbia CDL Double/Triple Trailers Marathon is a massive practice test that contains a compilation of all 48 questions that we have available for this DC endorsement. If you make a mistake, 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. As you work your way through the Marathon, you’ll notice that unlike the other District of Columbia CDL practice tests there are no explanations and no hints here. 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!

Available with a Premium account

Cover all your bases and make sure you pass the first time

  • 330+ additional questions (including the ones most people miss!)
  • 17 Members-Only practice tests across all endorsements (lifetime access)
  • 6 Exclusive Cheat Sheets (including the DMV's 171 most frequently asked questions)
  • Study and track your progress on any device, anywhere

PLUS: No ads, unlimited re-takes, our Pass Guarantee, and more!

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District of Columbia CDL Double/Triple Trailers Test Fact Sheet:

How many questions:20
How many correct answers to pass:16
Passing score:80%

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