Which term refers to a water supply system that combines gravity and direct pumping, and is the most common municipal system?

Which term refers to a water supply system that combines gravity and direct pumping, and is the most common municipal system?

• A. Water Main
• B. Combination System
• C. Gate Valve
• D. Pitot Tube

Answer: (B)

This item tests how a municipal water system delivers pressure by using both gravity and pumping. A combination system uses gravity pressure from elevated storage—such as water towers or elevated tanks—to push water through the distribution network, and it also employs booster pumps to raise or maintain pressure in areas that are higher in elevation or experience peak demand. This dual approach is the most common because it leverages the energy efficiency of gravity where possible while ensuring consistent pressure through pumping when needed, providing reliability across different terrains and usage patterns. Water mains are the large distribution pipes carrying water to neighborhoods, gate valves control the flow, and pitot tubes measure flow velocity—these are components or tools, not the system that blends gravity and pumping.

This item tests how a municipal water system delivers pressure by using both gravity and pumping. A combination system uses gravity pressure from elevated storage—such as water towers or elevated tanks—to push water through the distribution network, and it also employs booster pumps to raise or maintain pressure in areas that are higher in elevation or experience peak demand. This dual approach is the most common because it leverages the energy efficiency of gravity where possible while ensuring consistent pressure through pumping when needed, providing reliability across different terrains and usage patterns. Water mains are the large distribution pipes carrying water to neighborhoods, gate valves control the flow, and pitot tubes measure flow velocity—these are components or tools, not the system that blends gravity and pumping.