Before you back under a trailer, make sure that
a)The air brakes are off
b) The air supply knob is in
c) The trailer brakes are locked
Answer: c) The trailer brakes are locked
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a)The air brakes are off
b) The air supply knob is in
c) The trailer brakes are locked
Answer: c) The trailer brakes are locked
If the answers is incorrect or not given, you can answer the above question in the comment box. If the answers is incorrect or not given, you can answer the above question in the comment box.