You should not back a tractor under a trailer until the whole air system is
a) At normal pressure
b) Between 60 and 80 psi
c) Bled down to half the maximum pressure
Answer: a) At normal pressure
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a) At normal pressure
b) Between 60 and 80 psi
c) Bled down to half the maximum pressure
Answer: a) At normal pressure
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.