South Carolina CDL Practice Test: Tank - Test 4 2023
Based on 2023 SC CDL Handbook
Instruction: To obtain this endorsement for hauling any liquid or gaseous materials in a tank or tanks, applicants must pass a 15-question test. And to pass the test, applicants must score at least 80%. Test questions are from the SC CDL Handbook. The Tanker Vehicles endorsement can be used with the Class A, B, or C CDL. If you need additional information, please contact your local DMV office. You can find your nearest DMV office at South Carolina DMV locations.
1. A closed tractor protection valve ________.
Stops any air from going out of the tractor.
Let the air in the trailer emergency line.
Allows air from going out of the tractor.
Let the air out of the trailer rear line.
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