Practice question

When refueling a vehicle transporting hazardous materials:

  1. The engine should be left on.
  2. The engine should be turned off.
  3. The gas nozzle may be left unattended.
  4. Someone other than the driver should do it.

Answer: B — The engine should be turned off.

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

Practice more: Massachusetts CDL HazMat Test 2 →