【Daily Question】Utilities - Water Supply and Drainage - 20200125
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Which of the following statements regarding the hydraulic calculation of internal drainage pipes in buildings is correct? ( ) A. The horizontal drainage pipes inside a building are calculated using the formulas for unsteady flow in open channels. B. The vertical drainage pipes inside a building are calculated assuming that the flow within them is plug flow. C. In the hydraulic calculation formulas for horizontal drainage pipes, R represents the radius of the pipe. D. Vertical drainage pipes inside a building are designed based on their maximum water-carrying capacity under different ventilation conditions. Answer: D
D. The internal drainage risers in a building are designed based on their maximum water-carrying capacity under different ventilation conditions