What is signified by the water-motor gong in a sprinkler system?

• A. It Indicates The Temperature Of Water
• B. It Indicates That Water Is Flowing In The Sprinkler System
• C. It Indicates A Test In Progress
• D. It Indicates A Water Leak

Answer: (B)

The water-motor gong signals that water is actually flowing in the sprinkler system. When water starts moving through the pipes, a small water motor or turbine inside the alarm unit turns and drives the gong to sound. That audible signal tells firefighters and building personnel that the system is delivering water, typically because sprinklers have been activated or a test is underway. It’s not a temperature indicator, it doesn’t denote a test status by itself, and it isn’t a signal for a leak in the sense of a static condition—its purpose is specifically to indicate active water flow through the system.