Q
92. Which shut off valves should be open and which closed?
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Aa. The front trailer's shut-off valve open and the rear closed.
Bb. The rear trailer's shut-off valve open and the front closed.
Cc. Both front and rear trailer shut-off valves open.
Detailed Explanation
The correct answer is "a. The front trailer's shut-off valve open and the rear closed.". This is based on federal CDL regulations and safety standards.
Correct Answer: a. The front trailer's shut-off valve open and the rear closed.
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