An off-normal signal shall be initiated during which of the following travel distances of the...

This question is referring tosupervisory signaling for control valvesin sprinkler systems. When a valve begins to move from its normal (open) position, the fire alarm system must detect and signal thisbefore it reaches too far out of position.

NFPA 72 (2022), Section 17.16.1.3:

"Off-normal signal shall be initiated during the first one-quarter (1/4) of the valve travel distance from its normal position."

This ensures timely detection if someone begins to close a sprinkler valve, which could disable the fire suppression system.

Correct answer: B. 1/4

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