CFAA Fire Alarm Technician · Question
Per CAN/ULC-S524, when a smoke detector is removed from its plug-in base, what must occur?
Removing a device from its base must break the supervision current to the EOL, signaling a trouble. This ensures the device is physically present. CAN/ULC-S524
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Question: Per CAN/ULC-S524, when a smoke detector is removed from its plug-in base, what must occur?
Answer options:
- The device will stay active in the panel logs
- The short circuit will cause a fuse to blow
- The circuit will switch automatically to Class A ✅ The removal must result in a trouble signal at the FACP
Correct answer: The removal must result in a trouble signal at the FACP
Explanation: Removing a device from its base must break the supervision current to the EOL, signaling a trouble. This ensures the device is physically present. CAN/ULC-S524 §3.1.1.2.
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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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