Guan Moderator’s [Daily Question] [Weekly Topic] Summary Post

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This post was last edited by Guan Gongyu on 2015-9-8 at 14:48. Moderator Guan’s [Daily Question] [Weekly Topic] summary thread: 1. To help everyone review past daily questions; 2. To enable Moderator Guan to receive rewards. For the Mechanical Category’s [Daily Question] section, moderators who post questions are invited to claim their rewards. 3. If you have any good suggestions or opinions regarding [Daily Question] and [Weekly Topic], feel free to share them here! 4. Recruit new colleagues as well. 【Mechanical Zone】Recruitment for moderators & technicians – applications and referrals are welcome.【Valid indefinitely】【If you’re interested, come ahead!】 】 I. One question per day 1. [One question per day] August 17: Multiple-choice question – Among the following technical documents, which ones should be submitted for the inspection and acceptance of heat exchangers? 2. [One question per day] Sunday’s popular version, August 16: True or false question – Internal leakage in heat exchangers (first 80 + 2 points). 3. [One question per day] August 15: Multiple-choice question – What is the heat transfer area of this heat exchanger? 4. [One question per day] August 14: The value of △tm for the heat transfer process between the fluids on both sides of the partition is (first 80 + 2 points). 5. [One question per day] August 13, 2015: For industrial production, the easiest way to increase the heat transfer coefficient is… 6. [One question per day] August 12, 2015: Which of the following is not a type of shell-and-tube heat exchanger? (Full 50 floors of points available.) 7. [One question per day] August 11, 2015: In shell-and-tube heat exchangers, heat transfer mainly occurs through… 8. [One question per day] August 10, 2015: A characteristic of stable heat transfer is that the heat transfer rate remains constant at all times. 9. [One question per day] August 18: Multiple-choice question – What are the main areas where leaks occur in shell-and-tube heat exchangers? 10. [One question per day] August 23: True or false question – In the International System of Units, thermodynamic temperature is measured in degrees Celsius (℃). (Past 50 + 2 wealth points) http://bbs.hcbbs.com/thread-1430448-1-1.html 11. 【Daily Question】Popular version for the weekend of 8/22: Easy true-or-false questions (+2 wealth points for replies) http://bbs.hcbbs.com/thread-1430282-1-1.html 12. 【Daily Question】8/20 True-or-false question: In a shell-and-tube heat exchanger, when the heat transfer area remains constant (Past 100 + 2 wealth points) http://bbs.hcbbs.com/thread-1429728-1-1.html 13. 【Daily Question】8/19 Fill-in-the-blank question: What are the common cleaning methods used during the maintenance of shell-and-tube heat exchangers? (Past 80 + 2 wealth points) http://bbs.hcbbs.com/thread-1429377-1-1.html 14. 【Daily Question】8/31 Multiple-choice question: In a heat exchanger, when the flow directions of the two fluids are opposite, it is called (Past 80 + 2 wealth points) http://bbs.hcbbs.com/thread-1432186-1-1.html 15. 【Daily Question】Popular version for the weekend of 8/29–8/30: True-or-false questions (Past 50 + 3 + 3 wealth points) http://bbs.hcbbs.com/thread-1431863-1-1.html 16. 【Daily Question】9/3 Picture-based question: How many tubes does this heat exchanger have? http://bbs.hcbbs.com/thread-1432931-1-1.html 17. 【Daily Question】9.4 True or False: Based on the characteristics of heat exchange methods, heat exchangers can be divided into three categories. http://bbs.hcbbs.com/thread-1433044-1-1.html 18. 【Daily Question】9.5 True or False: Fixed-tube-sheet heat exchangers are suitable for... http://bbs.hcbbs.com/thread-1433155-1-1.html II. Weekly Topics 1. August 7, 2015: Methods for determining the materials used in the tube side and shell side of heat exchangers. 2. August 9, 2015: Equipment operation mistakes I encountered during district activities (prizes for participation). 3. August 16, 2015: 【Weekly Topic】Discussion on violations during heat exchanger maintenance (top 50 winners will receive rewards). 4. August 29, 2015: 【Weekly Topic】Is it okay if the bolts used to pressurize the shell side of a heat exchanger are not tightened fully? http://bbs.hcbbs.com/thread-1431956-1-1.html These activities have received strong support from @gn_1984, @humanrzm, Boss 28, and other moderators of this forum; we would like to express our special thanks to them! It has also been recognized by many sailors, with high participation from everyone. I will keep working hard to learn and improve together with everyone! Flowers are encouraged