ASTTBC RFPT — Fire Alarm Systems (AL) · Question
What is the maximum allowable sound pressure level for a fire alarm notification appliance?
NBCC 3.2.4.19(2) allows sound levels up to 110 dBA, but stipulates they must be at least 10 dBA above ambient. However, the absolute max for human hearing prote
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Question: What is the maximum allowable sound pressure level for a fire alarm notification appliance?
Answer options:
- 100 dBA ✅ 110 dBA
- 120 dBA
- 95 dBA
Correct answer: 110 dBA
Explanation: NBCC 3.2.4.19(2) allows sound levels up to 110 dBA, but stipulates they must be at least 10 dBA above ambient. However, the absolute max for human hearing protection in residential/occupancy areas is generally considered 110 dBA before they become a risk. S524 confirms 110 dBA as the maximum.
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Question explanations
- Which of the following constitutes a system 'deficiency' rather than a 'non-conformance' to current standards?
- When a deficiency is corrected, what specific information MUST be recorded in the log?
- Which of the following would be categorized as a 'Non-Conformance' to the Installation Standard (S524) in an i
- In the event of a deficiency that renders the fire alarm system inoperative, what is the mandatory reporting r
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