CFAA Fire Alarm Technician · Question
Which internal component of a fire alarm control panel is specifically responsible for monitoring the microprocessor's operational integrity?
CAN/ULC-S524 Section 4 requires that microprocessor-based systems include a 'Watchdog Timer' to monitor software execution and initiate a trouble/restart if the
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Question: Which internal component of a fire alarm control panel is specifically responsible for monitoring the microprocessor's operational integrity?
Answer options:
- Ground-fault monitor ✅ Watchdog timer
- Phase-rotation sensor
- End-of-line resistor
Correct answer: Watchdog timer
Explanation: CAN/ULC-S524 Section 4 requires that microprocessor-based systems include a 'Watchdog Timer' to monitor software execution and initiate a trouble/restart if the CPU hangs.
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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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