Practice question

On the Florida CDL Doubles and Triples test, what should you know about shut-off valve positions for doubles/triples?

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

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

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