[Daily question] [Static Equipment Exchange Edition...Question 140] Multiple choice question on May 20, 2019... Everything goes well

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This post was last edited by kareale88 on 2019-5-20 12:44 bg4.png [Daily question] [Static Equipment Communication Edition...Question 140] Multiple choice question on May 20, 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. .................................................................................Heat transfer area Calculates the heat transfer area, taking the heat exchange tube (1) as the basis, and deducting the length of the heat exchange tube that does not participate in heat exchange, the calculated surface area of ​​(2) is m2. A. Inner diameter ； B. Outer diameter ； C. Inside ； D. outside ； ---------------------Answer: (Inspection of GB/T 151-2014 heat exchanger knowledge points) 1. B 2. D