Practice Pumping Questions
PumpingQuestion 1 of 20
A lift station has three identical centrifugal pumps that discharge into the same force main (pumps in parallel). The pump curve table below is for ONE pump. The system curve table is for the force main (includes static lift and friction). Assume: - All three pumps are started and share flow equally. - For pumps in parallel, at a given head, the total flow equals the sum of the individual pump flows (i.e., each pump operates at the same head). - Use linear interpolation between table points. Extraneous data: Each pump is 50 hp and the wet well is 20 ft in diameter. Using the tables, what is the approximate TOTAL station flow when all THREE pumps operate in parallel, in MGD?
| Flow (gpm) | Head (ft) |
|---|---|
| 0 | 120 |
| 300 | 110 |
| 600 | 95 |
| 900 | 75 |
| 1,200 | 50 |
| 1,500 | 20 |
| Flow (gpm) | Head (ft) |
|---|---|
| 0 | 30 |
| 500 | 36.25 |
| 1,000 | 55 |
| 1,500 | 86.25 |
| 2,000 | 130 |
| 2,500 | 186.25 |