CFAA Fire Alarm Technician · Question
What is the maximum permitted spacing between two smoke detectors on a smooth, flat ceiling in an open area?
Smoke detectors must be installed so that the horizontal distance from the detector to any point on the ceiling does not exceed 0.7 times the listed spacing (RS
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Question: What is the maximum permitted spacing between two smoke detectors on a smooth, flat ceiling in an open area?
Answer options:
- 4.5 meters
- 12 meters ✅ 9 meters
- 15 meters
Correct answer: 9 meters
Explanation: Smoke detectors must be installed so that the horizontal distance from the detector to any point on the ceiling does not exceed 0.7 times the listed spacing (RS = 0.7 x S). For a standard 9m spacing, 6.3m is the radius. Simple rule: max 9m apart in open areas.
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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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