Pennsylvania CDL Double/Triple Trailers Practice Test

How should shut-off valves normally be positioned for air to reach the rear trailer in a set of doubles?

Open at the rear of the lead trailer and closed at the rear of the last trailer Closed at the rear of every trailer Open only at the rear of the last trailer Removed from the trailer air system

Correct Answer:

Open at the rear of the lead trailer and closed at the rear of the last trailer

Access more questions from this quiz

Continue to Pennsylvania CDL Double/Triple Trailers Practice Test for more practice questions and the full quiz experience.

Access More Questions