Instruments: [Daily Question] April 8, 2011

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This post was last edited by cnooczhouyx on 2011-4-13 08:47. [Daily Question] Question from April 8, 2011: 1. A double-flange level gauge is used to measure the liquid level in a container. The zero point and range of this gauge have both been calibrated correctly. Later, due to maintenance needs, the gauge is installed at a higher position. Then, the level gauge ( ) A. Has its zero point rise, while the range remains unchanged B. Has its zero point drop, while the range remains unchanged C. Has its zero point remain unchanged, while the range increases D. Has neither its zero point nor its range change. 2. Identify which of the following statements is incorrect ( ) A. When using a throttle flow meter to measure flow rate, the smaller the flow rate, the greater the measurement error； B. When using a throttle-type flow meter to measure flow, the ratio of the maximum flow rate that can be measured to the minimum flow rate should be around 3, with the maximum value not exceeding 88 ； C. If there are sudden changes in the lower pipe sections upstream and downstream of the throttle element, it will increase the flow coefficient ； D. During long-term operation of the orifice plate, when the sharp edges at the right-angled inlet become worn and blunted, the flow coefficient increases. Notes: 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 prize. For the \"Wealth\" category, 3 correct answers earn a certain reward and 2 incorrect answers result in no reward ； 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 April 8, 2011: 1. D 2. C.