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IA CDL Double/Triple Trailers Marathon

Ready to put your new knowledge to the test? This Iowa CDL Double/Triple Trailers Marathon is a monster of a practice test that contains a combination of all 101 questions that we have available for this IA 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”. Delivers some serious studying power! Do your best to complete this mega test!

Perfect for

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

What to expect on the actual IA DOT exam

How many questions20
How many correct answers to pass16
Passing score80%

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More IA CDL Double/Triple Trailers Resources

Helpful resources

IA CDL Handbook

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

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IA 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

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...

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