[Daily question] [Static Equipment Exchange Edition...Question 144] Multiple choice question on May 24, 2019... Everything goes well

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bg4.png [Daily question] [Static Equipment Exchange Edition... Question 144] Multiple choice question on May 24, 2019... Please understand that it will be sent in advance................................................................................................. Answers (single choice, single choice) please fill in the 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. Welding in which the strength of the welded connection between the heat exchange tube and the tube sheet meets the design requirements for the axial (tensile or compressive) mechanical and temperature difference loads of the heat exchange tube and ensures sealing performance is called (). A. Strength expansion ； B. light expansion ； C. Strength weldingD, sealing weldingE, inner hole weldingtubes welded to backside of tubesheet---------------------2. Mild expansion joint to eliminate the gap between the heat exchange tube and the tube sheet hole 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. C 2. B