Discuss Question - AllPreviousYears

Correct Answer: C. Centrifugal pump
Explanation: The correct answer is Centrifugal pump. A well-point system is a dewatering method used to lower the groundwater table in permeable soils like sand or gravel. This system utilizes a series of small-diameter tubes, or well-points, placed at close intervals around an excavation site. These tubes are connected to a common header pipe, which is then attached to a specialized pump. A centrifugal pump is considered essential for this operation because it is typically equipped with a priming tank or a vacuum-assisted system. This allows the pump to generate the necessary vacuum to draw water and air simultaneously from the ground through the well-points. While other pumps like reciprocating or jet pumps exist, they are less efficient for the high-flow, continuous vacuum requirements of a standard well-point dewatering setup. Centrifugal pumps are preferred for their ability to handle large volumes of water and maintain a dry, stable working environment for construction and excavation.

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