You are coupling a tractor to the semitrailer; you have connected the airlines. Before backing under the trailer, you should:
Supply air to the trailer system, then pull out the air supply knob
You are coupling a tractor to a semitrailer and have backed up, but are not under it. What should you hook up before backing under?
The emergency and service air lines
Tractor wit a ____ trailer requires the shortest amount of stopping distance
Fully loaded
After you have coupled the trailer you should raise the landing gear by using
Lower gear
You supply air to the trailer tanks by
Pushing in the trailer air supply valve