Question: A pump A whose characteristics are given in table 1, is used to pump water from an open tank through 40 m of 70

A pump A whose characteristics are given in table 1, is used

A pump A whose characteristics are given in table 1, is used to pump water from an open tank through 40 m of 70 mm diameter pipe of friction factor C+0.005 to another open tank in which the surface level of the water is 5.0 m above that in the supply tank. Determine the flow rate when the pump is operated at 1450 rev/min. (7.8 dm3/s) It is desired to increase the flow rate and 3 possibilities are under investigation. (1) (ii) To install a second identical pump in series with pump A. To install a second identical pump in parallel with pump A. To increase the speed of the pump by 10%. (iii) Predict the flow rate that would occur in each of these situations. Head-Flow Characteristics of pump A when operating at 1450 rev/min Head/m 9.75 7.73 6.90 Flow Rate/(l/s) 4.73 6.22 8.36 9.55 8.83 7.57 5.50 3.83 10.75

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