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English Translations » 【仪表自控交流圈】 » Process Engineering Division – Instrumentation and Automatio

Process Engineering Division – Instrumentation and Automation Technology Exchange Forum – Daily Question – Questions 12–30

2019-12-30View Original

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Process Engineering Section – Instrumentation and Automation Technology Forum – Daily Question – Questions 12–30: Multiple-choice questions: There is a gas-operated single-seat valve that fails to close properly while in operation; which of the following is NOT a possible cause of this issue? (   )  (A) Severe wear of the valve stem and seat (B) The valve actuator’s output is always at its maximum value (C) There are foreign objects stuck between the valve stem and seat (D) The valve stem is too short Answer: B

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Translated at 2026-07-21 02:27:14

Original: https://bbs.hcbbs.com/thread-2877924-1-1.html

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