【Daily Question】 【AC Version for Static Equipment...Question 19】 January 19, 2019 – True/False Multiple Choice Question...Prosperity and Peace for All
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This post was last edited by kareale88 on 2019-1-19 09:20: bg4.png【Daily Question】【AC Version for Static Equipment...Question 19】 January 19, 2019 – True/False multiple-choice question...Prosperity and peace for the country and its people. Please enter the answers (multiple choice, single choice, single choice) in order. Reward rules: 1 wealth for participation, 3 wealth for each correct answer, up to a maximum of 10 wealth. This topic is valid for two days; no score will be given if it exceeds two days, i.e., after 48 hours. The 2018 HaiChuan “Top 10 Outstanding Members” selection campaign has officially begun (Phase 1: Recommend the outstanding members in your eyes). https://bbs.hcbbs.com/thread-2243161-1-1.html There are also 19 rewards available; act now before it’s too late. Comprehensive Collection of Personal Integration Materials – Along with [Coating Materials – Integrated Compilation] – Adding a Touch of Color to the New Year https://bbs.hcbbs.com/thread-2259051-1-1.html 1. In what three forms do pressure vessel failures usually manifest themselves: (). A intensity ； B stiffness ； C stability ； D Ductility --------------2. Among the following shell-and-tube heat exchanger components, those for which a corrosion margin should be considered are (). A. Tube sheet B. Heat exchange tubes C. Baffle plates D. Support plates --------------3. When a load is applied, in certain small areas near where the cross-section changes, the stress level increases sharply; whereas slightly away from these areas, the stress decreases significantly and becomes more uniform. This phenomenon is known as _stress concentration_. ( ) A. Correct B. Incorrect ---------------- Answer: 1. A B C 2. A 3. A 1. Comment: This type of failure is one of the several types of failure that pressure vessel standards aim to control. 2. Comments: Basic design concepts for heat exchangers are specified in GB151. 3. Comment: This is a basic concept in elasticity theory. Commonly found in the pressure-bearing components of pressure vessels.
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1. In what three forms do pressure vessel failures usually manifest themselves: (ABC). A intensity ； B stiffness ； C stability ； D Ductility -------------- 2. Among the following shell-and-tube heat exchanger components, those for which a corrosion margin should be considered are (AB). A. Tube sheet B. Heat exchange tubes C. Baffle plates D. Support plates -------------- 3. When a load is applied, in certain small areas near where the cross-section changes, the stress level increases sharply; whereas slightly away from these areas, the stress decreases significantly and becomes more uniform. This phenomenon is known as _stress concentration_. (A) A. Correct B. Incorrect
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1. In what three forms do pressure vessel failures usually manifest themselves: (ABC). A intensity ； B stiffness ； C stability ； D Ductility -------------- 2. Among the following shell-and-tube heat exchanger components, the one for which a corrosion margin should be considered is (A). A. Tube sheet B. Heat exchange tubes C. Baffle plates D. Support plates -------------- 3. When a load is applied, in certain small areas near where the cross-section changes, the stress level increases sharply; whereas slightly away from these areas, the stress decreases significantly and becomes more uniform. This phenomenon is known as _stress concentration_. (A) A. Correct B. Incorrect
1.ABC 2.A 3.A