Which signal indicates a monitored condition is off-normal?

Which signal indicates a monitored condition is off-normal?

• A. Alarm Signal
• B. Supervisory Signal
• C. Trouble Signal
• D. Off-normal Signal

Answer: (B)

In fire alarm signaling, an off-normal condition is indicated by a supervisory signal. This type of signal shows that a monitored device or circuit is not in its normal state, but it isn’t an active fire or hazard requiring evacuation. It tells building staff or maintenance to investigate and restore the equipment to normal. This differs from an alarm, which signals an actual fire or hazard requiring immediate action, and from a trouble signal, which points to faults within the system itself (like power or communication issues). So the supervisory signal directly corresponds to the off-normal condition of monitored equipment.

In fire alarm signaling, an off-normal condition is indicated by a supervisory signal. This type of signal shows that a monitored device or circuit is not in its normal state, but it isn’t an active fire or hazard requiring evacuation. It tells building staff or maintenance to investigate and restore the equipment to normal.

This differs from an alarm, which signals an actual fire or hazard requiring immediate action, and from a trouble signal, which points to faults within the system itself (like power or communication issues). So the supervisory signal directly corresponds to the off-normal condition of monitored equipment.