【Daily Question】Catalytic Coking Reformate Blending Version 20180226
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Participation: Reward of 3~5 Wealth points； Correct answer: Reward of 10 wealth points ； Note: This post is valid for 48 hours. Multiple-choice question: Before starting a centrifugal pump, the pump is first filled with liquid, and this is done to ( ). (A) Negative pressure is generated at the center of the impeller to draw in liquid. (B) Operational safety. (C) Improved pump efficiency. (D) Increased head. Answer: A. 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 released 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 Post for 2017 on the Catalytic Coking and Reforming Oil Blending Version: https://bbs.hcbbs.com/thread-1826018-1-1.html 【Daily Question】Summary Post for 2017 on the Catalytic Coking and Reforming Oil Blending Version: https://bbs.hcbbs.com/thread-1811219-1-1.html
(A) Negative pressure is generated at the center of the impeller to draw in liquid
A) Negative pressure is generated at the center of the impeller to draw in liquid
(A) Negative pressure is generated at the center of the impeller to draw in liquid