CFAA Fire Alarm Technician · Question
In a two-stage fire alarm system, what is the required pulse rate for the 'Alert' signal?
The Alert signal (1st stage of a 2-stage system) uses a 1-pulse-per-second (20 bpm) rate, whereas Evacuation (2nd stage) uses the Temporal Pattern.
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Question: In a two-stage fire alarm system, what is the required pulse rate for the 'Alert' signal?
Answer options:
- 3 pulses followed by a 1.5s pause
- Constant steady ringing
- Short tones at 120 beats per minute ✅ 1 pulse per second (20 bpm)
Correct answer: 1 pulse per second (20 bpm)
Explanation: The Alert signal (1st stage of a 2-stage system) uses a 1-pulse-per-second (20 bpm) rate, whereas Evacuation (2nd stage) uses the Temporal Pattern.
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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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