Practice question

An NFPA 704 red 4 indicates that the material:

  1. Has severe health hazard
  2. Is severely reactive
  3. Will burn readily at all normal temperatures and is rapidly vaporized at standard atmospheric pressure, including gases and very volatile liquids
  4. Reacts with water

Answer: C — Will burn readily at all normal temperatures and is rapidly vaporized at standard atmospheric pressure, including gases and very volatile liquids

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