Instruments: [Daily Question] March 1, 2011

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This post was last edited by cnooczhouyx on 2011-3-2 at 10:20. [Daily Question] Question for March 1, 2011: 1. To control fluids that are highly viscous, contain fibers, or have fine particles, which type of control valve should be used? ( ) A. Eccentric rotary valve B. Butterfly valve C. Sleeve valve D. Angle valve 2. Intelligent electro-pneumatic valve positioners provide ( ) valve position feedback signals. A. 1-5V DC B. 0-10mA DC C. 4-20mA DC D. 0-5V DC Note: 1) The first 50 participants will definitely receive a reward; in principle, no additional points will be given beyond 50 participants. Among them, the top 20 who answer correctly will receive a prize, while those from 21st to 50th will get a participation award. Those who answer 3 questions correctly and 2 incorrectly will receive… ； Points can be awarded additionally for detailed analysis, in-depth discussion, and discretion ； 2) Please hide your replies; the method for doing this is at http://bbs.hcbbs.com/thread-492556-1-1.html. Do not edit the replies after posting them. (No rewards will be given for any replies that are not hidden. ) 3) Posts that expire will be closed, and the answers will become visible after the post is closed ； Thank you all for your participation ； 【Daily Question】Answer for March 1, 2011: 1. A 2. C.