Practice question

After coupling and connecting the air lines, you should next:

Drive forward immediately
Charge the trailer air system, then test for leaks before driving
Lower the landing gear
Pull the trailer air supply knob

Answer: B — Charge the trailer air system, then test for leaks before driving

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

Practice more: AK CDL Combination Practice Questions - Alaska CDL Combination Vehicles Test Exam →