Which device is included among mechanical waterflow devices?

Which device is included among mechanical waterflow devices?

• A. Water motor gong
• B. Pressure reducing valve
• C. Check valve
• D. Gate valve

Answer: (A)

Mechanical waterflow devices are those that signal movement of water with a physical action. A water motor gong does this by using flowing water to turn a small motor that rings a gong, providing an audible indication that water is flowing. Other items listed—pressure reducing valves, check valves, and gate valves—have roles in regulating or controlling flow (reducing pressure, preventing backflow, or isolating a line) rather than signaling that flow is occurring. So the water motor gong is the device that fits the category of a mechanical waterflow device.

Mechanical waterflow devices are those that signal movement of water with a physical action. A water motor gong does this by using flowing water to turn a small motor that rings a gong, providing an audible indication that water is flowing. Other items listed—pressure reducing valves, check valves, and gate valves—have roles in regulating or controlling flow (reducing pressure, preventing backflow, or isolating a line) rather than signaling that flow is occurring. So the water motor gong is the device that fits the category of a mechanical waterflow device.