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bg4.png【Daily Question】【AC Version for Static Equipment...Question 153】June 2, 2019 Multiple-choice questions...Everything is going well........................................................................... Please enter the answers (single choice each) in order. Examine the knowledge points of heat exchangers per GB/T 151-2014. Reward rules: 3 wealth points for participation, and 5 wealth points for a correct answer. ........................................................................... 1. For the circumferential welds of the shell side cylinder in fixed-plate heat exchangers where non-destructive testing is not possible, TIG welding should be used as a backing process, or gussets that are in close contact with the base metal should be placed along the entire length of the weld root; the welding joint coefficient φ = (). A、1.0 ； B, 0.85 ； C, 0.8 ； D, 0.6 ； ---------------------2. For the internal hole welding of the heat exchange tube to the tube sheet, when 100% radiographic inspection is carried out, the weld joint coefficient φ = 1.0; when partial radiographic inspection is used, the weld joint coefficient φ = 0.85; when no radiographic inspection is performed, the weld joint coefficient φ = (). A、1.0 ； B, 0.85 ； C, 0.8 ； D, 0.6 ； --------------------- Answer: (Tests knowledge of heat exchangers per GB/T 151-2014) 1. D 2. D