CFAA Fire Alarm Technician · Question
What is the maximum time allowed for a Fire Alarm Control Unit to indicate a 'Trouble' signal after the occurrence of a fault?
CAN/ULC-S527 specifies that a Trouble signal must be produced within 200 seconds of a fault being detected (such as a microprocessor failure or ground fault).
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Question: What is the maximum time allowed for a Fire Alarm Control Unit to indicate a 'Trouble' signal after the occurrence of a fault?
Answer options: ✅ 200 seconds
- 30 seconds
- 60 minutes
- 10 seconds
Correct answer: 200 seconds
Explanation: CAN/ULC-S527 specifies that a Trouble signal must be produced within 200 seconds of a fault being detected (such as a microprocessor failure or ground fault).
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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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