Instruments: [Daily Question] February 18, 2011

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The last edit to this post was made by cnooczhouyx on 2011-2-21 at 09:20. [Daily Question] Question for February 18, 2011: 1. The selection of instrument pressure tubes is related to the （ ） of the medium being measured. A. Physical properties B. Chemical properties C. Operating conditions D. All of the above 2. Among the following types of pipes, ( ) is generally not suitable as a protective sleeve for electrical circuits. A. Galvanized welded steel pipe B. Galvanized seamless steel pipe C. Rigid polyvinyl chloride pipe D. Red copper pipe Note: 1) The first 50 participants will definitely receive a reward; in principle, no additional points will be given for those beyond 50. Among them, the top 20 who answer correctly will receive a \"Wealth 5\" award, while those from 21 to 50 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 February 18, 2011: 1. D 2. D.