【Daily Question No. 255】2017.09.13

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【Daily Question No. 255】September 13, 2017: When a hydrogenation unit is shut down, the main purpose of using hot hydrogen along with oil to treat the catalyst is ( ). A. After heating the hydrogen with oil, when the reactor is opened there is no oil or gas present, allowing people to enter. B. Heating the hydrogen with oil ensures that it is safe to perform major maintenance and welding tasks on the equipment. C. It removes oil and hydrocarbon deposits from the catalyst. D. It reduces corrosion. The reference answers can be seen after responding; scoring is possible by identifying the key points. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) The answers to the daily activity questions have changed; today’s answers are shown in the subsequent questions. For management purposes, if you need to view content from a few days ago, please go through the summary post below. 2017 Q&A Summary Thread (updates have begun) http://bbs.hcbbs.com/thread-1657793-1-1.html 2017 Daily Question Summary Thread (updates have begun) http://bbs.hcbbs.com/thread-1657794-1-1.html 2016 Q&A Summary Thread (updates completed) http://bbs.hcbbs.com/thread-1597792-1-1.html (Source: Haichuan Chemical Industry Forum)