Which statement about supervisory signals is accurate in practice?

• A. A release valve activation indicates a monitored condition
• B. A heat detector triggers audible alarms
• C. A manual pull station activation triggers an alarm
• D. A smoke detector triggers notification appliances

Answer: (A)

Supervisory signals are used to show the status of protected equipment and indicate a condition that needs attention, but not an active fire event. A release valve activation fits this idea because it signals that the sprinkler or suppression system’s releasing mechanism has operated or moved from its normal state. That status change is something facilities staff must address or reset, rather than an immediate fire alarm to occupants.

In contrast, heat detectors, manual pull stations, and smoke detectors are initiating devices. They respond to heat, manual action, or smoke to start alarms and notify occupants, which is why those examples describe alarm activation rather than a supervisory condition. So, the release valve activation correctly represents a supervisory signal.