【Daily Question 2019】LNG Section – Question No. 53

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This post was last edited by Internet Invisible Man on 2019-2-22 at 22:15. [Daily Question 2019] LNG section – Question No. 53: In the operating environment of safety valves, the additional back pressure (static back pressure) varies, and when the change in back pressure is significant relative to the set pressure, which option should be chosen? Multiple-choice: A. Back-pressure balanced safety valve; B. Conventional safety valve; C. Direct-load safety valve; D. Pilot-operated safety valve. A. Based on the feedback from Haiyou, the answer is corrected. 3 points for correct, 1 point for incorrect ； Mass posting of posts – rated based on the lowest score ； Replies that are unrelated to the answer are considered spam and will be deleted immediately. For management purposes, if you need to view content from a few days ago, please go to https://bbs.hcbbs.com/home.php?mod=space&uid=3862647&do=thread&view=me&from=space through the summary post below