【Daily Question No. 181】June 30, 2017

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【Daily Question No. 181】June 30, 2017: Among the steps for switching lubricant filters, which of the following statements are correct? ( ) A. The spare filter is in standby mode. B. Slowly rotate the switching handle; be sure that there are no large fluctuations in oil pressure. C. Close the flushing valve and the drain valve of the filter, open the outlet valve, and slowly close the return valve. D. All of the above. The reference answers can be seen after responding; points will be awarded as long as the key points are answered correctly. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) Note: For questions of the type \"one question per day,\" if a person replies continuously for a month, that is, posts more than 30 times, their score will be assigned as 2 points, which is the lowest possible score. Click once to reply; if multiple replies are made, points will be awarded as appropriate, as deleting posts is also a waste of time. D Scoring Criteria: 2 Wealth points for incorrect attempts; 3–8 points for *incomplete* answers. 10 Wealth points for correct answers, provided with a detailed explanation; 15–20 Wealth points if the answer is correct but lacks sufficient details. Please score according to these criteria. Note: If there are editing records after answering, only 1 Wealth point will be given to the participant. For continuous malicious spamming, 2 Wealth points will be deducted each time, with no upper limit. Pure numbers, pure emojis, or random letters that have nothing to do with the answer are all considered malicious spamming. Points will start to be deducted after three warnings. 2017 Q&A Summary Thread (updating now) http://bbs.hcbbs.com/thread-1657793-1-1.html 2017 Daily Question Summary Thread (updating now) http://bbs.hcbbs.com/thread-1657794-1-1.html 2016 Q&A Summary Thread (already updated) http://bbs.hcbbs.com/thread-1597792-1-1.html