CFAA Fire Alarm Technician · Question
During annual testing, which method is required to confirm the operation of an air duct smoke detector?
Air duct smoke detectors are designed to detect smoke in the airstream and must be tested to ensure the pressure differential/airflow is within the manufacturer
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Question: During annual testing, which method is required to confirm the operation of an air duct smoke detector?
Answer options:
- Visual inspection of the LED only
- Using a handheld magnet
- Applying heat to the duct housing ✅ Measuring pressure differential and using aerosols per manufacturer instructions
Correct answer: Measuring pressure differential and using aerosols per manufacturer instructions
Explanation: Air duct smoke detectors are designed to detect smoke in the airstream and must be tested to ensure the pressure differential/airflow is within the manufacturer's listed range.
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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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