Petrochemical Deep Processing Version 2018.09.30
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Participation: Prize 1 Wealth； Correct answer: Reward of 3 wealth points ； Note: This post is valid for 48 hours. True or False: In proportional control, the air-on/air-off settings of all control valves must be identical. ( ) Answer: Incorrect. In distributed control, the air-on/air-off settings for all control valves are not necessarily the same. 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 (Phase 2): https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1868167&extra=page%3D1 Petrochemical Deep Processing Section [Daily Question] Summary Thread: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1496481
Wrong; for level control, the switching mechanism is usually a valve that opens in response to air pressure, while for pressure control, there is generally one valve that opens in response to air pressure and another that closes in response to it.