Oklahoma CDL Practice Test: Tank - Test 3 2023
Based on
2023 OK 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 OK 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 Oklahoma DPS locations.
1. What can cause a decrease in air pressure?
A
A trailer breaking loose.
B
The emergency air hose tearing.
C
All of the listed answers
D
A hose letting out air.