【Daily Question】 【AC Version for Static Equipment...Question 82】 March 23, 2019 – Revised multiple-choice questions...Everything is going well

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This post was last edited by kareale88 on 2019-3-23 at 11:25. File: bg4.png 【Daily Question】 【Static Equipment Discussion Forum...Question No. 82】 March 23, 2019. Modified multiple-choice question...Everything is going well. ...........................................................................The question is taken from the standard NB/T 47041-2014 «Tower Containers». Please point out any inaccuracies in the modifications; if you have any good suggestions, feel free to reply with them – rewards will be given generously. ........................................................................... Answers (multiple choice, multiple choice, multiple choice) please fill in in order. Reward rules: 1 wealth for participation, 3 wealth for each correct answer, up to a maximum of 10 wealth. ...........................................................................Corrosion margin: When the thickness of components in tower-type containers decreases due to corrosion, mechanical wear, etc., a corrosion margin must be taken into account. The specific requirements are as follows: a) For components subject to uniform corrosion or wear, the corrosion margin shall be determined based on the expected service life of the tower-type container and the corrosion rate (as well as wear rate) of the metal material by the medium ； b) When the corrosion levels experienced by various components of a tower-type container vary, different corrosion margins can be used ； 1. For tower-type vessels made of carbon steel or low-alloy steel, with a medium of compressed air, water vapor, or water, the corrosion allowance shall be not less than ( ) mm. A, 4 ； B, 3 ； C, 2 ； D, 1 ； ---------------------2. For skirt shell made of carbon steel or low-alloy steel, the C2 value shall be not less than ( ) mm. A, 4 ； B, 3 ； C, 2 ； D, 1 ； ---------------------3. The foot bolt C2 shall be not less than ( ) mm. A, 4 ； B, 3 ； C, 2 ； D, 1 ； ---------------------Answers: 1. D 2. C 3. B