【Daily Question】10.13 Reply +2； Correct +3

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This post was last edited by ren6602121 on 2015-10-14 08:41. In order to increase the popularity of the container section, an \"One Question per Day\" activity was initiated under the guidance of the leaders, aiming to foster active technical exchanges while also providing financial rewards to users. For Class A and B welded joints of low-temperature vessels, in addition to the requirement for 100% radiographic or ultrasonic non-destructive testing as specified, partial non-destructive testing is permitted; the inspection length shall be not less than C times the length of each welded joint, and shall also be not less than 250 mm. A) 20% B) 40% C) 50% D) 100% Please reply with the answer you think is correct; participating in the quiz earns +1 wealth point (points are added automatically per the rules). If your answer is incorrect, no additional points or feedback will be given. Answering all questions correctly earns an extra +3 wealth points. If you provide a detailed explanation or analysis of the questions and answers, you will receive additional wealth points as well. If your answer is correct and your explanation is accurate, it will be marked as the best reply (the best assistance). Feel free to answer; please do not reply repeatedly ； If a, b, c, and d are all correct, choose e; answering a, b, c, d, e will result in no points. Note: We will close this post after 24 hours to reveal the answers and explanations, as well as the best response (the best help provided). Attraction Bonus: If you post a topic in this section within two days to provide a detailed explanation of the knowledge points covered in this question, please reply to this post to inform us, and we will have a moderator grant you +Attraction. It is not allowed to simply copy and paste; original content is preferred, with at least some organization by the user along with personal insights and opinions. After registration, we will rank participants based on the content of their posts: the last-place participant will receive +1 charm point, the second-to-last +2 charm points, and so on, with the highest score earning +5 charm points. http://bbs.hcbbs.com/thread-1381938-1-1.html Inviting friends to join earns wealth. http://bbs.hcbbs.com/thread-1389197-1-1.html Seeking sponsors for naming rights