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Iowa CDL Practice Test: All - Test 2020

(From the 2020 Iowa CDL Handbook)
Number of tests: 35
Number of questions: 30
Passing score: 80

Directions: If you need additional information, please contact your local DMV office. You can find your nearest DMV office at Iowa DMV locations.

1. A serious traffic violation is which of the following?

2. Why should you check the tire shortly after it's been changed?

3. When your brake's main air pressure is lost ________.

4. What vehicles must be equipped with emergency brakes and parking brakes?

5. To test the parking brake you should _______.

6. Typically, at what psi does the air compressor governor stop the compressor from pumping air?

7. You will lose your CDL for three years ______.

8. How many mph above the posted speed limit is considered excessive speeding?

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