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ASTTBC RFPT — Fire Alarm Systems (AL) · Question

Visible signal devices are required in floor areas where the ambient noise level is likely to exceed:

NBCC 3.2.4.19.(10)(a) requires visual signals when the ambient noise exceeds 85 dBA because auditory signals may not be perceived.

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Question: Visible signal devices are required in floor areas where the ambient noise level is likely to exceed:

Answer options:

  • 70 dBA
  • 75 dBA ✅ 85 dBA
  • 95 dBA

Correct answer: 85 dBA

Explanation: NBCC 3.2.4.19.(10)(a) requires visual signals when the ambient noise exceeds 85 dBA because auditory signals may not be perceived.

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