Practice question

Before pulling the fifth wheel release handle during uncoupling, what should be done?

  1. Raise the landing gear fully
  2. Disconnect the tractor battery
  3. Lower the landing gear and secure the trailer
  4. Apply only the trailer hand valve and leave

Answer: C — Lower the landing gear and secure the trailer

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

Practice more: Massachusetts CDL Combination Practice Questions - Massachusetts CDL Combination Vehicles Test Exam →