【Daily Question】 【AC Version for Static Equipment...Question 32】 February 1, 2019 – True/False Question...Wish you good luck in the Year of the Pig

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bg4.png【Daily Question】【AC Version for Static Equipment...Question 32】February 1, 2019 – True/False multiple-choice question...Wish you good luck in the Year of the Pig — Thank you for voting. Answer (multiple choice, single choice, single choice): Please fill in each one 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 participants via Haichuan’s official WeChat account are eligible! https://bbs.hcbbs.com/thread-2281360-1-1.html I am extremely grateful to my fellow forum members who support me – rewards such as the Model 29 laptop, Haichuan Cup, phone credit, and 100 wealth points are available... 10 votes per day, with 10 draws per day... Hurry up and participate! 1. Which of the following requirements regarding the pressure vessel pressure test are incorrect? A. Whether a pressure vessel undergoes a hydraulic test or a pneumatic test after it is manufactured is determined at the discretion of the designer ； B. The gas used for pressure testing cannot be chosen arbitrarily ； C. The temperature of the test gas for pressure vessels made of carbon steel and low-alloy steel shall not be lower than 5℃ ； D. The requirements for a successful pressure test are that, during the test, the pressure vessel shows no abnormal noises, there is no leakage after checking for leaks, and no visible deformation is present. --------------------- 2. The return period of the basic wind pressure is (). A. 20 years B. 30 years C. 40 years D. 50 years --------------------- 3. When a cylinder has reinforcing rings on its saddle surface, the maximum shear stress τ occurs near the corners of the saddle. ( ) A. Correct B. Incorrect --------------------- Answers: 1. A C 2. D 3. B 1. Comments: Requirements for pressure vessel pressure testing. Article 98 of the old code on pressure vessels should still be applicable now; moreover, according to GB150, the operating temperature for Q235B plates is ≥20°C. 2. Comments: The new provision in the \"Code for Loads on Building Structures\" GB 50009—2001, 7.1.2, should be applied when selecting design loads for tower-type containers. 3. Comments: It is necessary to understand the stress conditions at various points in horizontal containers.