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ASTTBC RFPT — Portable Fire Extinguishers (EX) · Question

Which of the following extinguishers is exempted from the 6-year internal maintenance requirement but must still undergo hydrostatic testing every 12 years?

Per NFPA 10, Table 7.3.3.1, Halon 1211 extinguishers are exempted from the 6-year internal examination because they are closed-recovery systems; however, the cy

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Question: Which of the following extinguishers is exempted from the 6-year internal maintenance requirement but must still undergo hydrostatic testing every 12 years?

Answer options:

  • Stored-pressure water-type extinguishers
  • Stored-pressure dry chemical extinguishers
  • Non-rechargeable (disposable) dry chemical extinguishers ✅ Halon 1211 extinguishers

Correct answer: Halon 1211 extinguishers

Explanation: Per NFPA 10, Table 7.3.3.1, Halon 1211 extinguishers are exempted from the 6-year internal examination because they are closed-recovery systems; however, the cylinders themselves still require a 12-year hydrostatic test.

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