What is the emergency air line for?
a) To engage the front brakes of the tractor in case of an emergency
b) To engage the trailer brakes in case of air pressure loss
c) To have extra air pressure in case you need it
Answer: b) To engage the trailer brakes in case of air pressure loss
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.