[Daily question] [Static Equipment Exchange Edition...Question 142] Multiple choice question on May 22, 2019... Everything goes well

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bg4.png [Daily question] [Static Equipment Communication Edition...Question 142] Multiple choice question on May 22, 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 accuracy of level I tube bundles is lower than that of level II tube bundles. () A. Correct ； B. Error ； ---------------------2. The expansion connection strength of the heat exchange tube and the tube sheet meets the design requirements of the heat exchange tube axial (tension or pressure) mechanical and temperature difference loads and ensures the sealing performance 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 ； ---------------------Answer: (Inspection of GB/T 151-2014 heat exchanger knowledge points) 1. B 2. A