CFAA Fire Alarm Technician · Question
In areas where the ambient noise level exceeds ______, visual notification appliances must be provided because audible signals may not be heard.
Under S524, if ambient noise exceeds 85 dBA, audible signals are no longer effective/safe for hearing, and visible signals are required. If it exceeds 105 dBA,
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Question: In areas where the ambient noise level exceeds ______, visual notification appliances must be provided because audible signals may not be heard.
Answer options:
- 70 dBA
- 85 dBA ✅ 105 dBA
- 120 dBA
Correct answer: 105 dBA
Explanation: Under S524, if ambient noise exceeds 85 dBA, audible signals are no longer effective/safe for hearing, and visible signals are required. If it exceeds 105 dBA, visual signals are mandatory.
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Question explanations
- The primary power for a fire alarm system must be:
- If a 120VAC primary power circuit for a fire alarm control unit is consuming 60 Watts of power, what is the cu
- In a steady-state DC circuit, if the conductor length is doubled while maintaining voltage and wire gauge, wha
- A resistor is rated at 10 Watts at 24VDC. If the voltage drops to 20VDC, what is the new power dissipation?
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