【Daily Question No. 182】2018.07.06

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【Daily Question No. 182】July 06, 2018: The reason why an excessively high excess air coefficient in a heating furnace can lead to damage to the furnace tubes is ( ). A. Oxygen in the air reacts with the furnace tubes, causing oxidation and peeling. B. High-temperature flames affect the furnace tubes. C. Moisture in the air leads to dew point corrosion of the furnace tubes. D. Sulfur in the fuel gas reacts with the furnace tubes to form polysulfates. A (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) 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 access it through the summary post below. https://bbs.hcbbs.com/home.php?mod=space&uid=719164&do=thread&view=me&from=space The APP short-video skill competition has started! https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1951670