【Daily Question】Catalytic Cracking, Coking, and Reforming Version 20170220

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To increase the popularity of this section, a daily quiz activity has been launched. The purpose of this activity is: “Learn a little bit every day, and make significant progress over ten days.” I hope everyone will participate actively; by learning and making progress, they can also easily bring wealth home :) . Participation: Prize of 5 Wealth ； Correct answer: Reward of 10 wealth points ； Note: Questions from the same day will receive full feedback if answered on the same day; answers given the next day will earn 5-8 wealth points. This post is valid for 48 hours. http://bbs.hcbbs.com/static/image/hrline/4.gif Multiple-choice question (Coking section): After the supply of raw materials to the coking unit is interrupted, what should the heating furnace pay attention to? (　　) A. Prevent coking of the furnace tubes B. Prevent dew point corrosion C. Prevent oxidation of the furnace tubes D. Prevent collapse of the furnace wall. Correct answer: A. Petrochemical sector – Innovative ideas for energy savings: an activity aimed at sparking creativity. http://bbs.hcbbs.com/thread-1669271-1-1.html Xiaomi phones are waiting for you to claim them