Iowa CDL Practice Test: Class A - Test 6 2023
Based on 2023 IA CDL Handbook
Instruction: 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 IA CDL Handbook. Endorsements that may be used with a Class A 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 DOT locations.
2. The parking brake valve should close when the air pressure falls into what range?
70- 85 psi.