What is the primary function of a fire alarm system?

The primary function of a fire alarm system is to detect and notify occupants of a fire. This system is designed to detect smoke, heat, or flames and promptly alert people within the building or area, allowing for timely evacuation and response to the emergency. By providing immediate notification, the fire alarm system plays a crucial role in ensuring the safety of occupants and mitigating potential injuries or fatalities during a fire incident.

While other options have relevance in the broader context of fire safety and emergency management, they do not serve as the main purpose of a fire alarm system. For example, controlling fire suppression systems is typically the role of separate fire control mechanisms, which may be activated based on information provided by the fire alarm, rather than being the primary function itself. Similarly, providing a visual signal for evacuations and monitoring indoor air quality are important aspects of overall safety and health in buildings, but they are secondary functions that depend upon the initial detection and notification capabilities of the fire alarm system.