[Utilities – Water Supply and Drainage Section] 20181020

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Which statement regarding the flow relationships in the water supply system is correct? () a. All structures in the water supply system are designed based on the average daily flow rate. b. The flow rate at the water intake structure is determined by the average daily flow rate, the coefficient for water used within the water treatment plant, and the number of operating hours per day for the primary pumping station. c. The storage capacity of water towers (high-level reservoirs) is determined based on the variation in water demand and the operation of the secondary pumping station. d. The clean water tank serves as a facility for regulating water volume between the water intake structure and the primary pumping station. Answer: c. The various structures in the water supply system are designed based on the maximum daily design flow rate ； The water intake structure is designed based on the highest daily average hourly flow rate ； The water volume at the water intake structure is the same as that at the primary pumping station ； A water tower is a facility used to adjust the difference between the water supply volume from the secondary pumping station and the water demand of users; its regulating capacity is determined based on the water demand curve and the operating curve of the secondary pumping station