Which statement is true about water balance in plant operation?

Which statement is true about water balance in plant operation?

• A. It is used to manage inflows, outflows, storage, and ensure adequate pressures and supply reliability.
• B. It is used to determine the exact pH of finished water.
• C. It is a measure of chlorine residual in the distribution system.
• D. It is used to set the plant's budget.

Answer: (B)

Water balance measures how water moves through a plant: what enters the system, what leaves, and what is stored, and how those amounts affect pressure and the ability to supply customers reliably. By tracking these flows and storage, operators can plan pumping, reservoir levels, and demand responses to keep pressure within acceptable ranges and avoid shortages or overflows. The exact pH of finished water is a chemical quality parameter, not a balance of volumes. Chlorine residual is also a water quality measure related to disinfection, not how water is balanced across the system. Setting the plant’s budget is a financial consideration, separate from the hydraulic balance. So the true concept is managing inflows, outflows, storage, and ensuring adequate pressures and supply reliability.

Water balance measures how water moves through a plant: what enters the system, what leaves, and what is stored, and how those amounts affect pressure and the ability to supply customers reliably. By tracking these flows and storage, operators can plan pumping, reservoir levels, and demand responses to keep pressure within acceptable ranges and avoid shortages or overflows. The exact pH of finished water is a chemical quality parameter, not a balance of volumes. Chlorine residual is also a water quality measure related to disinfection, not how water is balanced across the system. Setting the plant’s budget is a financial consideration, separate from the hydraulic balance. So the true concept is managing inflows, outflows, storage, and ensuring adequate pressures and supply reliability.