Q
41. Why must air tanks be drained?
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ATo drain all the air out of the tank.
BTo drain moisture and oil out of tank.
CTo tell you how much air is in the air tanks.
Detailed Explanation
The correct answer is "To drain moisture and oil out of tank.". This is based on federal CDL regulations and safety standards.
Correct Answer: To drain moisture and oil out of tank.
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