【Daily Question】Utilities - Mechanical & Electrical - 20191109
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The cleaning of cold (hot) water systems is a type of closed-loop cleaning, and it should be carried out in a proper manner. A. Drain the water every 1–2 hours, repeating this 3 times. B. Drain the water every 2–3 hours, repeating this 3 times. C. Drain the water every 2–3 hours, repeating this multiple times until the water quality becomes clean. D. Drain the water every 1–2 hours, repeating this multiple times until the water quality becomes clean. Answer: D
D. Drain the water every 1–2 hours, repeating this process multiple times until the water quality becomes clean
D. Drain the water every 1–2 hours, repeating this process multiple times until the water quality becomes clean