What are the two main types of pumps used in water systems?

The correct answer identifies the two main types of pumps used in water systems: positive displacement pumps and centrifugal pumps.

Positive displacement pumps operate by trapping a fixed amount of fluid and then forcing it into the discharge pipe. This design ensures that the flow rate is consistent regardless of pressure changes in the system, making these pumps highly effective for applications requiring precise flow rates. They are often used in situations where the pump needs to maintain a steady flow despite variable conditions.

Centrifugal pumps, on the other hand, use rotational energy to move fluid through the pump. They convert mechanical energy into hydraulic energy by utilizing a rotating impeller to impart velocity to the fluid before discharging it. This type of pump is well-suited for applications requiring high flow rates at relatively low pressures, making it commonly employed in various water supply systems.

The combination of these two types of pumps covers a broad range of applications, making them fundamental to water systems.