What system uses smoke detectors that function in the event of a fire alarm?

The fire alarm systems utilize smoke detectors that are specifically designed to detect the presence of smoke and trigger alarms during a fire event. These systems are integral to fire safety, as they are not only capable of alerting building occupants to evacuate but also notify emergency services for a faster response to the incident.

Fire alarm systems are equipped with various components, including smoke detectors, heat detectors, and manual pull stations, all of which work in unison to ensure the safety of individuals within a building. Smoke detectors play a crucial role because they can identify smoldering fires or the early stages of combustion, allowing for timely alerts before the situation escalates.

In contrast, while security systems focus on protecting a building from unauthorized access or incidents like theft, and building management systems manage the operational aspects of a facility, their primary functions do not involve smoke detection or responding to fire emergencies. Evacuation systems focus on facilitating the safe and effective exit of occupants during an emergency but do not directly include the smoke detection mechanisms integral to fire alarm systems. Therefore, the correct answer, indicating the specific system that uses smoke detectors functioning in the event of a fire alarm, is indeed fire alarm systems.