How would you respond to a sudden drop in system pressure that affects multiple zones and appears not to be caused by a pump outage?

How would you respond to a sudden drop in system pressure that affects multiple zones and appears not to be caused by a pump outage?

• A. Ignore SCADA alarms and wait.
• B. Check for leaks, valve misoperations, closed valves, storage issues, SCADA alarms, isolate zones, and coordinate with operations to restore service.
• C. Increase pumping in all zones.
• D. Immediately shut down the entire system.

Answer: (B)

The situation tests how to respond to a sudden, system-wide pressure drop by quickly diagnosing potential multi-zone issues and containing the problem rather than assuming a single pump failure. The best approach is to act on SCADA alarms and hydraulics by checking for leaks, valve misoperations or closed valves, and storage issues that could pull pressure across several zones. If you identify an affected area, isolate those zones using valves to limit the spread of the pressure loss, while coordinating with operations to restore service. Then focus on root cause and restoration: repair any leaks, reposition mis-set valves, or address storage/depletion as needed, and adjust pumping only as necessary to re-balance pressure in the isolated sections. This method protects customers, prevents further damage, and restores service efficiently. Ignoring alarms, increasing pumping across all zones, or shutting down the whole system would create safety risks, escalate outages, or waste resources.

The situation tests how to respond to a sudden, system-wide pressure drop by quickly diagnosing potential multi-zone issues and containing the problem rather than assuming a single pump failure. The best approach is to act on SCADA alarms and hydraulics by checking for leaks, valve misoperations or closed valves, and storage issues that could pull pressure across several zones. If you identify an affected area, isolate those zones using valves to limit the spread of the pressure loss, while coordinating with operations to restore service.

Then focus on root cause and restoration: repair any leaks, reposition mis-set valves, or address storage/depletion as needed, and adjust pumping only as necessary to re-balance pressure in the isolated sections. This method protects customers, prevents further damage, and restores service efficiently. Ignoring alarms, increasing pumping across all zones, or shutting down the whole system would create safety risks, escalate outages, or waste resources.