【Daily Question】Catalytic Coking Reformate Blending Version (Multiple Choice) 20171105
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Participation: Prize of 5 Wealth； Correct answer: Reward of 10 wealth points ； Note: This post is valid for 48 hours. Multiple-choice question: The installation of blind flanges on pipelines where welding work is to be carried out must be done in accordance with established procedures. For pipelines with a diameter of 150–250 mm, the thickness of the blind flanges should be no less than ( ). A、1mm B、3mm C、5mm D、10mm Answer: C. Please participate by using your fingers – our ultimate goal is for everyone to acquire knowledge. https://bbs.hcbbs.com/static/image/hrline/1.gif https://bbs.hcbbs.com/static/image/hrline/2.gif Note: The answers will be released automatically after two days. 【Q&A】Summary Post for 2017 on the Catalytic Coking and Reforming Oil Blending Version https://bbs.hcbbs.com/thread-1826018-1-1.html 【Daily Question】Summary Post for 2017 on the Catalytic Coking and Reforming Oil Blending Version https://bbs.hcbbs.com/thread-1811219-1-1.html
The installation of blind flanges on pipelines where welding is carried out must be done in accordance with established procedures; for pipelines with a diameter of 150–250 mm, the thickness of the blind flanges must be no less than (C). A、1mm B、3mm C、5mm D、10mm