【Daily Question 2019】Hydrogen production and hydrogenation section – Question No. 5-21

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【Daily Question 2019】Hydrogen production and hydrogenation section – Question No. 5-21: When a centrifugal pump is in standby mode and it is found to be running in reverse, the main reason for this is ( ), and it should be addressed promptly. A. High outlet pressure B. High inlet liquid level C. Internal leakage in the outlet valve D. Internal leakage in the inlet valve. Choosing C as the correct answer earns 1 point; those who get it right will receive an additional 2 points, while those who get it wrong will not score any points. The person in charge should promptly update the score for the question setter. Temporarily, the top 60 players will receive automatic wealth +1. 3 correct for wealth, 1 incorrect for wealth ； Mass posting of posts – rated based on the lowest score ； Replies that are unrelated to the answer are considered spam and will be deleted immediately. For management purposes, if you need to view content from a few days ago, please go to https://bbs.hcbbs.com/home.php?mod=space&uid=3862647&do=thread&view=me&from=space through the summary post below