Practice question

What is the proper way to confirm the trailer parking (spring) brakes work?

Connect a fully charged trailer, release tractor parking brake, pull the red trailer air supply knob OUT, and gently try to move the rig forward in a low gear — it should hold
Apply only the foot brake
Drain the trailer tanks
Disconnect the glad hands

Answer: A — Connect a fully charged trailer, release tractor parking brake, pull the red trailer air supply knob OUT, and gently try to move the rig forward in a low gear — it should hold

The correct answer is shown above. Try the full quiz for additional practice.