Practice question

During a trip, which shut-off valves should be open?

  1. All shut-off valves should be open.
  2. The rear shut-off valves should be open.
  3. All shut-off valves should be in the open position, except the rear shut-off valves.
  4. No shut-off valves should be open.

Answer: C — All shut-off valves should be in the open position, except the rear shut-off valves.

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

Practice more: West Virginia CDL Double Test 2 →