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IA CDL General Knowledge Marathon

  • Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements
  • Based on 2024 IA commercial driver's license manual
  • Updated for July 2024
Verified by Steven Litvintchouk, M.S., Chief Educational Researcher, Member of ACES. See our detailed commitment to accuracy and quality in our practice tests.
IA commercial driver's license

About this test

120 min to complete
Available in EN and ES

Ready to put your new knowledge to the test? This Iowa CDL General Knowledge Marathon is a super-challenging study tool that contains all 693 questions from our database for this IA endorsement. If you select a wrong 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”. Good luck!

Enhance your preparation with our comprehensive General Knowledge test collection, tailored to cover all key topics of the CDL exam. For a complete understanding of the expenses involved, check out our guide on CDL license cost, and for a step-by-step guide to getting your CDL, visit our CDL license guide.

What to expect on the actual IA CDL exam

50

questions

40

correct answers to pass

80

passing score

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