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Participation: Prize 1 Wealth; Correct answer: Reward of 3 wealth points ; Note: This post is valid for 48 hours. https://bbs.hcbbs.com/static/image/hrline/2.gif https://bbs.hcbbs.com/static/image/hrline/3.gif 【Daily Question】Multiple-choice question: Before switching a quick shut-off valve from manual to automatic mode, it is necessary to first check whether there is sufficient air supply; the required air pressure should be no less than ( ) MPa. If there is no wind, open the inlet needle valve. A、0.02 B、0.04 C、0.2 D、0.4 Answer: D 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 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 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
【Daily Question】Multiple-choice question: Before switching a quick shut-off valve from manual to automatic mode, it is necessary to first check whether there is sufficient air supply; the required air pressure should be no less than ( ) MPa. If there is no wind, open the inlet needle valve. D, 0.4