CFAA Fire Alarm Technician · Question
Sensitivity testing for smoke detectors is typically measured and recorded in which units?
The code requires sensitivity testing to ensure the detector is within its listed range to prevent nuisance alarms or delayed response. Use of % obscuration per
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Question: Sensitivity testing for smoke detectors is typically measured and recorded in which units?
Answer options:
- Voltage level
- Amperage draw
- Decibel level ✅ Percent obscuration per foot
Correct answer: Percent obscuration per foot
Explanation: The code requires sensitivity testing to ensure the detector is within its listed range to prevent nuisance alarms or delayed response. Use of % obscuration per foot is standard.
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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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