For double and triple trailers you would need to check that air flows to all the trailers. To do this you will need to use the __________ to provide air to the service line.
Answer: Trailer handbrake
CDL MCQ
CDL
For double and triple trailers you would need to check that air flows to all the trailers. To do this you will need to use the __________ to provide air to the service line.
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