What is the typical signal response when a water flow switch is activated?

• A. The fire alarm control panel triggers a fire alarm to notify occupants and emergency services
• B. The system silences all alarms
• C. Only a local buzzer sounds with no panel notification
• D. The water supply is automatically shut off

Answer: (A)

When a water flow switch is activated, the important signal is that water is moving in the sprinkler piping, which indicates that sprinklers have released. This flow is detected and the switch sends an initiating signal to the fire alarm control panel. The panel then triggers the building’s fire alarm, alerting occupants and, if connected, notifying emergency services or a monitoring station. This immediate panel notification is essential for fast evacuation and rapid response.

Other options don’t reflect how a flow switch functions. Silencing alarms would defeat safety by stopping warnings. A local buzzer with no panel notification isn’t enough to alert the whole building or responders. Automatically shutting off the water supply isn’t a standard response triggered by a flow switch, since the system’s purpose is to detect flow and raise the alarm.