【Daily Question 2019】Hydrogen production and hydrogenation section – Question No. 4-29

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【Daily Question 2019】Hydrogen production and hydrogenation section – Question No. 4-29: The purpose of using finned tubes in the air cooler tube bundle is to increase the （） of the outer surface of the tubes, thereby improving heat transfer efficiency. A. Heat transfer area B. Temperature C. Heat rejection D. Thickness 1 (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) Setting it to a reply earns 1 wealth point; those who answer correctly receive an additional 2 wealth points, while those who get it wrong receive no points at all. Please have the person in charge update the wealth points consumed by the question setter as soon as possible. Temporarily, the top 60 players will receive +1 to automatic wealth acquisition. 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