What must happen to the system control equipment when power is restored after being lost?

The correct answer indicates that the system control equipment is designed to automatically restore itself once power is resumed after an outage. This is a critical feature for fire alarm systems, as they must be operational at all times to ensure the safety of occupants in a building.

Automatic restoration means that the system can resume its monitoring and alarm functions without requiring human intervention, thus minimizing the risk of missing any potential emergencies that could occur after a power loss. This capability ensures that fire detection and alert systems remain reliable and ready to respond as soon as power is available again.

In contrast, other options may suggest a level of disruption that could compromise safety. For instance, requiring manual intervention to reset could create delays in the system being operational, which is not ideal in emergency situations. Notifying the operator of the power loss is useful, but it does not ensure immediate operational readiness. Activating all alarms until verified could lead to confusion and unnecessary panic, especially in non-emergency situations. Therefore, the automatic restoration feature is essential for maintaining the integrity and reliability of fire alarm systems.