Practice question

What is the proper sequence for uncoupling?

Release fifth wheel, lower landing gear, disconnect air, drive away
Position trailer, apply trailer brakes, lower landing gear, disconnect lines, release fifth wheel lock, drive away
Drive forward, then back up, then release the lock
Disconnect air first, then back under to release

Answer: B — Position trailer, apply trailer brakes, lower landing gear, disconnect lines, release fifth wheel lock, drive away

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