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Iowa CDL Practice Test: Class B - Test 6 2020

(From the 2020 Iowa CDL Handbook)
Number of tests: 14
Number of questions: 30
Passing score: 80

Directions: When applying for this license, applicants must pass a 50-question test. And applicants must score 80% to pass the test. The following questions are based on the details provided in the Iowa Commercial Driver Handbook. Endorsements that may be used with a Class B CDL include Hazardous Materials, Passenger, Double and Triples, HazMat and Tanker, Air Brakes and School bus. If you need additional information, please contact your local DMV office. You can find your nearest DMV office at Iowa DMV locations.

1. When you brake a tractor-trailer combination that has ABS, you should ________.

2. Where are the brake drums located?

3. If you are transporting a sealed load, how often should you inspect it?

4. If you are driving in freezing temperatures, which of the following is a quick and easy way to see if ice has formed on the road?

5. You should avoid driving through deep puddles during the winter, but if you can't avoid the puddles which of the following is something you should NOT do?

6. You will need to pass the pre-trip vehicle inspection test ________.

7. How are the brake drums connected to the wheels?

8. You will lose your CDL for at least ____ days if you have committed your first violation of an out-of-service order.

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