[Daily question] [Static Equipment Exchange Edition...Question 143] Multiple choice question on May 23, 2019... Everything goes well

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bg4.png [Daily question] [Static Equipment Communication Edition...Question 143] Multiple choice question on May 23, 2019... All the best......................................................................................Answers (single-choice, single-choice) please fill in each in order. Examine the knowledge points of GB/T 151-2014 heat exchangers. Bonus rules: Participation will reward you with 3 wealth, and correct answers will reward you with 5 wealth. ....................................................................1. The welding between the heat exchange tube and the tube sheet using a butt weld on the shell side to form a butt joint or bottom lock joint is called (). A. Strength expansion ； B. light expansion ； C. Strength welding ； D. seal weld seal weld ； E. Inner hole welding tubes welded tobackside of tubesheet ； ---------------------2. The welding that only ensures that the connection between the heat exchange tube and the tube plate does not leak is called (). A. Strength expansion ； B. light expansion ； C. strength welding strength weldD, seal welding seal weldE, inner hole welding tubes welded tobackside of tubesheet------------------------Answer: (Inspection of GB/T 151-2014 heat exchanger knowledge points) 1. E 2. D