【Daily Question】 【AC Version for Static Equipment...Question 31】 January 31, 2019 – True/False Question...Good snow predicts a good harvest

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This post was last edited by kareale88 on 2019-2-2 at 12:35: bg4.png【Daily Question】【Static Equipment Discussion Forum...Question 31】 January 31, 2019 – True/False multiple-choice question...Good snow predicts a good harvest. 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 scoring will be given if it exceeds two days by 48 hours. ........................................................................... Final voting stage for the 2018 “Top 10 Outstanding Members of Haichuan” – only available via Haichuan’s official WeChat account! https://bbs.hcbbs.com/thread-2281360-1-1.html I am extremely grateful to all my friends who support me – vote for number 29. After voting, there will be drawings for prizes such as laptops, Haichuan cups, phone credit, and 100 units of wealth points... 10 votes/10 drawings per day... Please participate quickly! ........................................................................... 1. When the design pressure of a flange is high, if bolts with lower strength are used, the required area of those bolts will result in an increased diameter of their central circles, which in turn affects the lever arm used in calculating the flange’s torque, leading to an unreasonable flange design. A. Increase ； B. Reduce ； ........................................................................... 2. The natural vibration period of tower-shaped containers with equal diameter and equal wall thickness is obtained by simplifying them to (). A. Single-degree-of-freedom system B. Two-degree-of-freedom system C. Multi-degree-of-freedom system D. Elastic continuum ..................................................... 3. The safety valve is installed outside the first pipe flange sealing surface of the pressure vessel; therefore, it falls outside the scope defined by GB150 for pressure vessels. Hence, the requirements for such safety valves should only comply with the provisions of the Pressure Vessel Regulations. ( ) A. Correct B. Incorrect ........................................... Answers: 1. A A A 2. D 3. B 1. Comments: This question tests the understanding of formula 7.5.2.3 in GB150.3, which deals with the design of basic pressure vessels. 2. Comments: Basic concepts of tower-type container design. 3. Comments: The scope of application of GB/T150.1-2011 is specified in 1.6.5.