[Test Your Knowledge] Chemical Production Knowledge (52) – True or False Questions

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This post was last edited by swwsdwf on 2010-1-13 21:02. True or False questions: (Answer format: True True True True False) 1. To transport saturated water vapor with a gauge pressure of 0.5 Mpa and a flow rate of 180 m3/h, seamless steel pipes of type Dg80 should be used； 2. When two centrifugal pumps of the same specification are used in series, at the same flow rate, the head on the characteristic curve of the series pumps is twice the head on the characteristic curve of a single pump ； 3. The steam trap can automatically and intermittently discharge condensate while preventing steam from escaping ； 4. Among centrifugal pumps, the Y-type pump is an oil pump ； 5. The shaft power of a centrifugal pump is highest when the flow rate is zero. Reference answers: Wrong, Right, Right, Right, Wrong. 1. To transport saturated water vapor with a gauge pressure of 0.5 Mpa and a flow rate of 180 m3/h, seamless steel pipes of type Dg40 should be used. 5. The shaft power of a centrifugal pump is at its minimum when the flow rate is zero. Note: 1) For each correct answer in this activity, 2 points are awarded, with a total of 10 points available. To encourage members to answer questions carefully, those who score full marks and provide explanations for any answers they consider incorrect will be rewarded with 1 Charm point. Those who do not hide their answers or do not format them accordingly will, in principle, not be graded. 2) Answers using the same IP are valid only for the first post. Also, please be cautious when posting; edits are invalid (except for replies on the first floor). 3) To achieve the goal of reviewing old material to gain new insights, the answer key is released the following day. Additionally, if you have any objections to the answer key for a particular question, you can post a topic thread for in-depth discussion. 4) Replies to this activity are limited to the 50th floor; replies from floors above the 50th will not be considered.