Practice question

After a tug test, why should you still visually inspect the fifth wheel?

  1. Massachusetts bans tug tests
  2. A tug test alone may not reveal an unsafe lock
  3. The visual check replaces all brake tests
  4. The jaws control the trailer lights

Answer: B — A tug test alone may not reveal an unsafe lock

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 →