【Daily Question】Utilities - Water Supply and Drainage - 20191113

2019-11-13View Original

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There is an office building in which a water pump draws water from a reservoir and supplies it to a rooftop tank. The elevation difference between the lowest level of the reservoir and the highest level of the rooftop tank is 61 m. It is known that the total head loss in the piping system is 5.15 mH2O, while the head loss at the inlet of the tank is 2 mH2O. Then the total head required by the water pump is ( ) m. A 61 B 66.5： C 63 ； D 68.15. Answer: D is the correct answer. The pump head H = H1 + H2 + H3, where H1 is the difference in height between the lowest level of the water tank and the highest level of the reservoir, H2 represents the head loss, and H3 is the head of the water exiting the pump ； H=61+5.15+2＝68.15m.

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【Daily Question】Utilities - Water Supply and Drainage - 20191113

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