【Daily Question】Catalytic Cracking, Coking, and Reforming Version 20170130

Thread Content

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 3 Wealth ； Correct answer: Reward of 8 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 3-5 wealth points. This post is valid for 48 hours. http://bbs.hcbbs.com/static/image/hrline/4.gif Multiple-choice questions (Restructuring section): The valves upstream and downstream of a control valve can generally be ( ). A: Gate valve B: Globe valve C: Butterfly valve Correct answer: A http://bbs.hcbbs.com/static/image/hrline/4.gif Petrochemical sector—“Creative Ideas for Energy Savings” campaign http://bbs.hcbbs.com/thread-1666758-1-1.html Xiaomi phones available for you to claim. Thread for collecting chemical technology materials in the “Petrochemical Section” http://bbs.hcbbs.com/thread-1654603-1-1.html Many prizes waiting for you to claim