【Daily Question】Catalytic Coking Reformate Blending Version (Multiple Choice) 20171028
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Participation: Prize of 5 Wealth； Correct answer: Reward of 10 wealth points ； Note: This post is valid for 48 hours. Single-choice question: Which of the following is not an auxiliary device of a pneumatic control valve? ( ) A. Valve positioner B. Pressure reducing valve C. Handwheel D. Actuator. Answer: D. Take a moment to participate – our ultimate goal is for everyone to acquire knowledge. http://bbs.hcbbs.com/static/image/hrline/1.gif http://bbs.hcbbs.com/static/image/hrline/2.gif Note: The answers will be published automatically after two days. 【Q&A】Summary post for 2017 of the Catalytic Coking Reformate Blending Version http://bbs.hcbbs.com/thread-1826018-1-1.html 【Daily Question】Summary post for 2017 of the Catalytic Coking Reformate Blending Version http://bbs.hcbbs.com/thread-1811219-1-1.html
The following is not an auxiliary device of a pneumatic control valve: (C). A. Valve positioner B. Pressure reducing valve C. Handwheel D. Actuator