51. Air and electrical lines from the tractor to the trailer should be:
Secured but with enough loop to turn.
52. You have a major leak in the service line and you put on the brakes. Service air will escape and cause the:
Trailer emergency brakes to come on.
53. A tractor with a ____ trailers requires the shortest amount of stopping distance.
Fully loaded.
54. When you get ready to back under a semitrailer you should line up:
Directly in front of the trailer.
55. Off-tracking of cheating causes of which of these to follow the wider pass while making a turn?
Tractor towing a 45-feet trailer.