【Daily Question】Catalytic Cracking, Coking, and Reforming Version 20170227
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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/5.gif Multiple-choice question (Catalysis section): When starting up a catalytic unit, if the auxiliary combustion chamber does not ignite within 30 seconds, close the gas valve and the electric igniter; open the unpurified air valve fully. After purging for at least ( ), it is possible to attempt ignition again. A. 5 minutes. B, 20 minutes. C, 30 minutes. D, 40 minutes. Correct answer: A ======================== Petrochemical area – “Creative Ideas for Energy Savings” event: http://bbs.hcbbs.com/thread-1669271-1-1.html Xiaomi phones are waiting for you to claim them
When starting up the catalytic unit, if the pilot burner in the auxiliary combustion chamber does not ignite within 30 seconds, close the gas valve and turn off the electric igniter; then open the unpurified air valve fully. After purging for at least (A) minutes, ignition can be attempted again. A. 5 minutes. B, 20 minutes. C, 30 minutes. D, 40 minutes.