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【Daily Question】Utilities - Water Supply and Drainage - 20191213

2019-12-13View Original

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This post was last edited by hesonchang214 on 2019-12-15 at 20:05. In a certain type-II high-rise building, the fire hydrant cabinet is equipped with an SN65mm fire hydrant, a 25-meter-long rubber-lined hose, and a nozzle with a diameter of 19mm. When the length of the solid water jet emitted from the nozzle is 10 meters, the flow rate at the nozzle is 5.7 L/s, and the flow characteristic coefficient of the nozzle is 1.577. Under these conditions, the pressure at the fire hydrant outlet should be ( ) mH2O.     A.18.9     B.16.4     C.15.5      D.13.5  Answer: A

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