CFAA Fire Alarm Technician · Question
Which of the following is NOT a valid method for measuring the 'sensitivity' obscuration level of a conventional smoke detector?
Aerosol smoke is used for functional testing of the smoke entry into the chamber (Section 5.7.4.3), not for quantitative sensitivity measurements.
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Question: Which of the following is NOT a valid method for measuring the 'sensitivity' obscuration level of a conventional smoke detector?
Answer options:
- Manufacturer-provided calibration tools ✅ Standard aerosol smoke spray canned products
- Calibrated obscurometer tools
- Software interfaces for Fire Alarm Control Units
Correct answer: Standard aerosol smoke spray canned products
Explanation: Aerosol smoke is used for functional testing of the smoke entry into the chamber (Section 5.7.4.3), not for quantitative sensitivity measurements.
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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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