What type of signal indicates the need for action regarding a fire alarm system?

The correct choice signifies a signal that alerts personnel to conditions that require immediate attention to ensure safety and compliance with relevant fire codes. A supervisory signal typically indicates that there are issues with system components or that there is a need to take action, such as checking equipment or performing required maintenance. This ensures that the fire alarm system is operating correctly and ready to respond in the event of an emergency.

Understanding this can highlight the importance of regular inspections and monitoring of fire systems, as supervisory signals are instrumental in maintaining safety standards and effective emergency response. The other types of signals refer to different alerts, such as trouble signals that indicate malfunctions and suppression signals that may activate fire suppression systems. However, supervisory signals specifically call for proactive measures to ensure ongoing operational readiness and safety in the building.