CFAA Fire Alarm Technician · Question
When performing a verification on a two-stage system, what is the required response when the second stage is manually initiated while the first stage is active?
Under CAN/ULC-S537-19, the verification must confirm that the alert signal is inhibited upon 2nd stage activation and the second stage takes precedence.
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Question: When performing a verification on a two-stage system, what is the required response when the second stage is manually initiated while the first stage is active?
Answer options:
- The alarm signal is delayed by 60 seconds
- The alert signal continues to pulse over the alarm signal
- The alerts signal is replaced by a voice message only ✅ The alert signal is superseded by the second stage alarm signal
Correct answer: The alert signal is superseded by the second stage alarm signal
Explanation: Under CAN/ULC-S537-19, the verification must confirm that the alert signal is inhibited upon 2nd stage activation and the second stage takes precedence.
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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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