Practice question

After finishing a pre-trip inspection, you should:

  1. Leave the rear shut-off valves open.
  2. Remove the service line valve.
  3. Close the emergency line valve.
  4. Leave the emergency line valve open.

Answer: C — Close the emergency line valve.

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

Practice more: Massachusetts CDL Tank Test 1 →