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ASTTBC RFPT — Fire Alarm Systems (AL) · Question

How is a 'Positive Alarm Sequence' (if utilized) verified in CAN/ULC-S537?

A 'Positive Alarm Sequence' allows a delay for investigation; the verification must ensure that if the delay expires or a second device trips, the general alarm

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Question: How is a 'Positive Alarm Sequence' (if utilized) verified in CAN/ULC-S537?

Answer options: ✅ The delay timer and the manual override function

  • Only the final alarm sounding
  • The ability to bypass all smoke detectors indefinitely
  • The battery backup for the timer only

Correct answer: The delay timer and the manual override function

Explanation: A 'Positive Alarm Sequence' allows a delay for investigation; the verification must ensure that if the delay expires or a second device trips, the general alarm sounds.

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