【Daily Question 2019】Hydrogen production and hydrogenation section – Questions 4–9

2019-04-09View Original

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【Daily Question 2019】Hydrogen production and hydrogenation section – Questions 4–9: What should be done when starting a gear pump? A. The inlet and outlet valves are open. B. The inlet and outlet valves are closed. C. The inlet valve is open and the outlet valve is closed. D. The outlet valve is open and the inlet valve is closed. 1 (Unless otherwise specified, all questions and answers are based on the hydrogenation unit.) ) Correct: 3 wealth, Incorrect: 1 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

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【Daily Question 2019】Hydrogen production and hydrogenation section – Questions 4–9

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