A closed valve in suppression agent piping is a serious impairment to the fire suppression system. Therefore, valve positions are monitored by a ? to ensure that they remain open at all times.

A closed valve in suppression agent piping is a serious impairment to the fire suppression system. Therefore, valve positions are monitored by a ? to ensure that they remain open at all times.

• A. Valve supervisory switch
• B. Pressure gauge
• C. Flow meter
• D. Central control panel

Answer: (A)

The key idea is to reliably confirm where each suppression valve sits so the system knows it can release agent when needed. This is done with a valve supervisory switch. Attached to the valve, it provides a discrete signal showing whether the valve is fully open. If the valve moves toward closed or isn’t fully open, the switch changes state and sends an alarm to the control system, alerting operators to the impairment before discharge occurs. A pressure gauge only shows pressure, not valve position; a flow meter measures how much agent or water is moving but doesn’t indicate whether the valve is open; and the central control panel is where signals are received and displayed, but it relies on a supervisory device to know the actual valve status.

The key idea is to reliably confirm where each suppression valve sits so the system knows it can release agent when needed. This is done with a valve supervisory switch. Attached to the valve, it provides a discrete signal showing whether the valve is fully open. If the valve moves toward closed or isn’t fully open, the switch changes state and sends an alarm to the control system, alerting operators to the impairment before discharge occurs. A pressure gauge only shows pressure, not valve position; a flow meter measures how much agent or water is moving but doesn’t indicate whether the valve is open; and the central control panel is where signals are received and displayed, but it relies on a supervisory device to know the actual valve status.