【Daily Question】【Static Equipment AC Version...Question 120】July 19, 2019 Multiple-choice...Fill-in-the-blank

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bk15.jpg【Daily Question】【AC Version for Static Equipment...Question 120】 July 19, 2019 Multiple-choice questions...Fill-in-the-blank questions...........................................................................Reward rules: 3 Wealth points for participation, 10 Wealth points for correct answers. No scoring will be given after two days, except during holidays. ...........................................................................a. In heat exchanger design, the grooves provided for thermal expansion are intended to increase the （） between the tube sheet and the heat exchange tubes. b. The requirement regarding the roughness of the tube holes is meant to achieve （）。 c. The outer guide cylinder of a vertical shell-and-tube heat exchanger should have an opening at the lower end of the inner liner cylinder ( ). ...........................................................................Comment: To assess the designer’s understanding of the standards and the objectives of structural design requirements. Answer: Pulling force ； Seal ； Lacrimal pore.