Q
Why should a driver inspect air and electrical lines on a tractor-trailer?
General Knowledgemedium
ADamaged or crossed lines can affect brakes and lights
BThey control the radio volume
CThey replace the need for mirrors
Detailed Explanation
Combination vehicle inspections include checking service lines, emergency lines, and electrical connections.
Correct Answer: Damaged or crossed lines can affect brakes and lights
Reviewed by Baha Mustafa, CDL holder, against official CDL manuals and FMCSA rules.
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