Case 17 from 10 years ago
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A centrifugal pump transfers a material with a density of 1200 kg/m3 from an open tank to a closed container at a higher elevation, where the gauge pressure is 145 kPa. The height difference between the liquid level in the container and that in the open tank is 10 m (the feed inlet of the container is below the liquid level). When the pump delivers a flow rate of 36 m3/h, its efficiency is 0.6. What is the shaft power of this pump in kW? (A) 5.2 (B) 3.8 (C) 4.4 (D) 3.6. In solving this problem, the conditions related to pipeline friction losses are not taken into account; the correct answer assumes that these losses are negligible. Excuse me, how exactly is this problem solved?
I just did the calculation – is the answer C? Since the question does not provide any hints regarding the calculation of resistance, it can be ignored.