Practice question

A Florida CDL applicant is reviewing shut-off valve positions for doubles/triples. Which statement is correct?

  1. Valve positions do not matter after coupling
  2. Front or intermediate trailer rear valves open; last trailer rear valves closed
  3. All rear valves closed on every trailer
  4. All rear valves open including the last trailer

Answer: B — Front or intermediate trailer rear valves open; last trailer rear valves closed

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