【Daily Question】 【AC Version for Static Equipment...Question 68】 March 9, 2019 – Revised multiple-choice questions...Everything is going well
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【Daily Question】【AC Version for Static Equipment...Question 68】March 9, 2019 – Revised multiple-choice questions...Everything is going well........................................................................... The final voting stage for the 2018 “Top Ten Outstanding Members of Haichuan” has concluded – hope you’ll be nominated for this year’s list! Wishes to my friends in Haichuan: happiness every year, a harmonious family life, good fortune and success, smooth affairs and good health, and prosperity throughout life! ........................................................................... 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. ........................................................................... 1. According to GB16749, for bellows made of austenitic stainless steel, fatigue considerations can be omitted when the combined stress σR ≤ 2σSt. ( ) A、Correct ； B. Incorrect ； --------------------- 2. When opening holes in an elliptical head in the transition zone, the calculated thickness of the shell used in determining the required reinforcement area A refers to the nominal thickness of the elliptical head. ( ) A. Correct ； B. Incorrect ； --------------------- 3. During the hydraulic testing of tower-type containers, vertical or horizontal testing is permitted. ( ) A. Correct B. Incorrect --------------------- Answers: 1. A 2. B 3. A 1. Comment: This question tests the understanding of basic knowledge regarding bellows, and it also involves the mechanical concept of structural stability. 2. Comments: It is clear that depending on the location of the opening, different thicknesses are used in the calculations for strengthening the opening; it should be the calculated thickness. 3. Comments: Basic considerations in the design of tower-type containers.
Mark the answers: 1. A 2. B 3. A. 1. Comment: This question tests the understanding of basic knowledge regarding bellows, and it also involves a mechanical concept related to structural stability. 2. Comments: It is clear that depending on the location of the opening, different thicknesses are used in the calculations for strengthening the opening; it should be the calculated thickness. 3. Comments: Basic considerations in the design of tower-type containers.
1. GB16749 stipulates that for bellows made of austenitic stainless steel, fatigue issues can be disregarded when the combined stress σR ≤ 2σSt. (A ) A, Correct ； B. Incorrect ； --------------------- 2. When opening holes in an elliptical head in the transition zone, the calculated thickness of the shell used in determining the required reinforcement area A refers to the nominal thickness of the elliptical head. (B) A, correct ； B. Incorrect ； --------------------- 3. During the hydraulic testing of tower-type containers, vertical or horizontal testing is permitted. (A) A. Correct B. Incorrect
1, A/2, B/3, A