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Iowa CDL General Knowledge Test 8 2025
- Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements
- Based on 2025 IA commercial driver's license manual
- Triple-checked for accuracy
- Updated for March 2025
This Iowa General Knowledge practice test contains another 50 questions based on the official CDL manual. All questions have been updated for March 2025. These questions are designed to prepare you for the General Knowledge portion of your Iowa Commercial Driver’s License exam. They are multiple-choice and offer three possible answers for each question. Only one of those three answers is correct, so choose carefully. If you’re not sure about the correct answer, you can use the hint provided for each question. As you work your way through these questions, you’ll begin to notice that the hint will point you to the correct answer without giving away the correct answer itself. This should allow you to make an informed decision about the correct answer, even if you don’t actually know it. Every time you answer a question, you’ll get immediate feedback with a detailed explanation, so you won’t need to wait until the end of the test to know the correct answers. Our CDL practice tests are not timed, so you can take as long as you need to answer each question. Good luck!
7 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.
Pass the first time,
guaranteed with Premium
guaranteed with Premium
What to expect on the actual IA DOT exam
50
questions
40
correct answers to pass
80%
passing score
More IA DOT Written Exam Resources
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