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.

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Practice more: New Jersey CDL Double Test 1 →