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This post was last edited by Green Lotus on 2019-2-17 at 10:24. Participants: Prize 1 Wealth； Correct answer: Reward of 3 wealth points ； Note: This post is valid for 48 hours. Final voting stage for the 2018 “Top 10 Outstanding Members of Haichuan” – only participants via Haichuan’s official WeChat account are eligible! https://bbs.hcbbs.com/thread-2281360-1-1.html Candidates selected for the Petrochemical Division: No. 32, Green Lotus; No. 33, Treasure Pot 1; No. 34, Internet Invisible Man. Everyone is welcome to participate actively in voting! Thank you! ! ! https://bbs.hcbbs.com/static/image/hrline/2.gif https://bbs.hcbbs.com/static/image/hrline/3.gif 【Daily Question】Multiple-choice question: When switching from a variable-frequency pump to a fixed-frequency pump, start the fixed-frequency pump first and gradually increase the flow rate at its outlet; meanwhile, the operator should reduce the current of the variable-frequency pump accordingly until it reaches 0. Then close the outlet of the variable-frequency pump, and the operator uses ( ) to control the flow rate. A. Outlet flow control valve of the AC pump B. Motor current of the AC pump C. Motor voltage of the AC pump D. Outlet gate valve of the AC pump Answer: A. Make a little progress every day. Your participation is the greatest support for our work. Giving roses to others leaves a pleasant fragrance in one’s own hands. https://bbs.hcbbs.com/static/image/hrline/1.gif https://bbs.hcbbs.com/static/image/hrline/2.gif Note: The answers will be published automatically after two days. “My Device, My Home – Large-Scale Original Photo Sharing Event (Part 2): https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1868167&extra=page%3D1 【Q&A】Summary of Catalytic Coking and Reforming Oil Blending Data for 2017–2018~~Continuously being updated: https://bbs.hcbbs.com/thread-1826018-1-1.html 【Daily Question】Summary of Catalytic Coking and Reforming Oil Blending Data for 2017–2018~~Continuously being updated: https://bbs.hcbbs.com/thread-1811219-1-1.html