Q
Before a drive, ensure that air flows to all trailers by:
Combination Vehiclesmedium
AChecking the dashboard gauges
BOpening the rear shut-off valves and listening for escaping air
CInspecting the hoses
Detailed Explanation
The correct answer is "Opening the rear shut-off valves and listening for escaping air". This is based on federal CDL regulations and safety standards.
Correct Answer: Opening the rear shut-off valves and listening for escaping air
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