Texas Commission on Environmental Quality (TCEQ). Class C Water License Exam

What term describes the distance from the water level in the well to the centerline of a pump?

1. Dynamic head

2. Static suction head

3. Total dynamic head

4. Friction head

The correct answer is: Static suction head

The term that describes the distance from the water level in the well to the centerline of a pump is known as static suction head. This measurement is crucial, as it indicates the vertical distance that the pump must draw water from the well to the pump's inlet. In essence, it represents the pull of gravity on the water column and the energy available to the pump to lift the water. Static suction head is significant because it directly impacts the pump's ability to function efficiently. If this distance is too great, the pump may struggle to maintain proper suction, leading to cavitation or decreased performance. Other terms, such as dynamic head, total dynamic head, and friction head, refer to different factors involved in pumping systems. Dynamic head relates to the energy required to lift water beyond the static level and accounts for factors like flow rate and speed. Total dynamic head encompasses both static head and the dynamic head, essentially representing the total energy the pump must exert to move water through the system, including overcoming friction. Friction head specifically addresses the losses of energy due to resistance encountered in pipes or fittings. Understanding these distinctions helps ensure proper pump selection and system design for effective water management.