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ASTTBC RFPT — Fire Alarm Systems (AL) · Question

In a sleeping room, the fire alarm signal must have a sound pressure level of at least _____ at the bed head.

NBCC 3.2.4.18(3) allows the signal level to be reduced to 75 dBA in a sleeping room if the door is closed, but it must be at least 75 dBA at the bed head. Gener

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Question: In a sleeping room, the fire alarm signal must have a sound pressure level of at least _____ at the bed head.

Answer options:

  • 65 dBA
  • 70 dBA ✅ 75 dBA
  • 85 dBA

Correct answer: 75 dBA

Explanation: NBCC 3.2.4.18(3) allows the signal level to be reduced to 75 dBA in a sleeping room if the door is closed, but it must be at least 75 dBA at the bed head. General area requirement is 10 dB above ambient.

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