[Daily question] [Static Equipment Exchange Edition...Question 56] Multiple choice question on February 25, 2019...all the best

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This post was last edited by kareale88 on 2019-2-25 15:15 bg14.jpg [Daily question] [Static Equipment Exchange Edition...Question 56] Multiple-choice question on February 25, 2019...All the best...................................................................Blessings to Haichuan's friends: Happy every year, a happy family, good luck, everything goes well and everyone is healthy, and good luck in life! .................................................................................... Please fill in the answers (single choice, single choice, single choice) in order. Bonus rules: Participation will reward 1 wealth, and correct answers will reward 3 wealth for each item, with a maximum of 10 wealth. This topic is valid for two days and will not be graded for more than two days and 48 hours. .................................................................... The final voting stage of the 2018 "Ocean Double Top Ten Outstanding Members" - participation is limited to the official WeChat account of Ocean S! See link below for details: https://bbs.hcbbs.com/thread-2281360-1-1.html Thank you very much to the sea friends who support our region - vote on the 28th (@ bubble_ZPTK) No. 29 (@kareale88) No. 30 (@亚美) No. 31 (@梦100) Draw after voting: Rewards such as notebooks, Haichuan Cup, phone bills, 100 wealth... 10 votes/10 draws/day... Hurry up and participate... 1. The cylinder pitch diameter formula assumes that the stress in the cylinder is uniformly distributed along the wall thickness. In fact, the hoop stress in a high-pressure thick-walled cylinder is unevenly distributed along the wall thickness, and the maximum hoop stress is located on the ( ) wall of the cylinder. A. Inside ； B. outside ； ---------------------2. When the design temperature of the lower head of the tower vessel is greater than or equal to ()°C, an air isolation ring should be installed on the upper part of the skirt near the head. A. 200B, 300C, 400D, 500---------------------3. The overall reinforcement types are:: Increase the thickness of the shell, use thick-walled pipes with full-section welding structures, overall reinforced forgings thick-walled tubes and overall reinforced forgings. () A. Correct B. Wrong------------------------Answer 1. A 2. C 3. A 1. Comments: This is the most common stress distribution in a thick-walled cylinder. It tests the designer's understanding of basic stress distribution and mastery of basic concepts. 2. Comments: For the original words, see 6.5.3 in Tower Vessel NB/T47041-2014. When the temperature is high, great local stress will occur at the connection between the skirt and the head. Therefore, the specification stipulates the structure above 400°C. 3. Comments: GB150.3 6.3.2.2 regulations.