2010-3-2** Question—Multiple-choice—(Prize for participation)

Thread Content

Multiple-choice question: In a heat exchanger, the heat exchange tubes are arranged on the tube sheet; among the various arrangements, the one that allows the maximum number of tubes to be placed within the same area of the tube sheet is the （ ） arrangement. A. Square B. Equilateral triangle C. Concentric circles D. Rectangle 5. When shutting down a tube bundle heat exchanger, ( ) A. Stop the hot fluid first, then the cold fluid B. Stop the cold fluid first, then the hot fluid C. Stop both fluids simultaneously D. It doesn’t matter 6. The advantages of a coiled tube heat exchanger are. A. High heat transfer film coefficient B. Large average heat transfer temperature difference C. High heat transfer rate D. Little variation in heat transfer rate. A 7-tube shell and tube heat exchanger belongs to ( ). A. Direct mixing type heat exchanger ； B、Regenerative heat exchanger ； C、Partitioned heat exchanger ； D. None of the above. 8 The type of heat exchanger in which a stirrer can be installed is ( ). A. Casing ； B、Kettle type ； C、Jacket ； D. Heat pipe Which of the following does not belong to a shell-and-tube heat exchanger? A, U-tube type ； B、floating head type ； C. Spiral plate type ； D. Fixed tube sheet type. The purpose of installing baffle plates in shell-and-tube heat exchangers is to increase the ( ) of the fluid flowing in the shell side, thereby enhancing turbulence and improving the convective heat transfer coefficient in that side. A. Viscosity ； B. Density ； C. Speed ； D. Height. This question was provided by member t18l; please keep an eye on the provider for updates. The purpose of this* topic is to help everyone review some basic theoretical knowledge, gain new insights by reviewing what has been learned before, discuss and gain a deeper understanding of standards or specifications, as well as address specific issues encountered in practice. This enables us to learn together and improve together; all friends are welcome to participate actively. If you have good *questions, you can also provide them to us; we will give rewards to those who provide them. For more details, please refer to the top post in the heat exchange section titled “Special Thread for Collecting Questions and Answers Related to Heat Exchange Technology”, with the link: http://bbs.hcbbs.com/thread-526242-1-1.html. Note: 1. For fill-in-the-blank, multiple-choice, true/false, and essay questions, please reply using the hidden format (for specific methods of hiding replies, see http://bbs.hcbbs.com/viewthread.php?tid=492556&highlight=%D2%FE%B2%D8). Rewards will be given to those whose replies are correct; those who do not use the hidden format or revise their replies will not receive any rewards. Please cooperate actively. 2. For multiple accounts under the same IP responding to participate, only the first response is valid.