【Daily Question】Utilities - Water Supply and Drainage - 20200427

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Which of the following statements about drinking water purification systems is incorrect? A. Potable water should be prepared by using municipal water as the raw material and subjecting it to advanced treatment processes. B. The rated flow rate of the faucets for potable water should be 0.04 L/s. C. Potable water supply should be provided through a speed-regulated pump set. D. A circulation system should be installed for potable water, and the residence time of water in this circulation network should not exceed 8 hours. Answer: D. Explanation: Options A, B, and C comply with paragraphs 1, 2, and 3 of Article 5.7.3 of the current “Code for Design of Building Water Supply and Drainage Systems”, respectively. Option D does not comply with the provisions of Article 5.7.3, Paragraph 5, of the current Code for Design of Building Water Supply and Drainage. The residence time of water in the circulating pipeline network should not exceed 6 hours