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【Daily Question】Utilities - Water Supply and Drainage - 20200207

2020-02-07View Original

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A hospital (α=1.5) has three floors, and it is equipped with cast-iron domestic drainage pipes that extend to the roof for ventilation. These pipes serve to handle the wastewater from 1 shower (N=0.45, q=0.15 L/s, b=80%) and the wastewater from 1 toilet (N=4.5, q=1.5 L/s, b=2%). The diameter of the drainage pipe that meets the requirements while being the most economical is (   ) mm.   A 75       B50      C100      D125  Answer: C

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