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 ________.
A
Let the air in the trailer emergency line.
B
Allows air from going out of the tractor.
C
Stops any air from going out of the tractor.
D
Let the air out of the trailer rear line.