【Purification Daily Question】2016.6.23

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To increase the popularity of the purified area, a \"One Question per Day\" campaign was launched to foster an active atmosphere for technical exchanges while providing members with certain financial rewards. (Fellow sailors, if you have any good questions, feel free to send them to me; let’s work together.) 【Question of the Day】 (Multiple choice) Which of the following steps represent the correct procedure for shutting down a compressor? A. First, open the large return valve. B. Reduce the speed of the compressor. C. Close the large outlet valve of the compressor before shutting it down. D. Close the large inlet valve of the compressor before shutting it down. Reply with your answer; participating in the quiz earns +2 wealth points. Those who get all answers correct will receive an additional +3 to +8 wealth points. Those who provide a thorough analysis and explanation of the questions or answers (or include detailed calculation processes) will receive extra wealth points as a reward. If your answer is correct and your analysis and explanation are accurate, it will be marked as the best reply (or the best assistance). Feel free to answer the questions. AB