【Daily Question】Catalytic Coking Reformate Blending Version (Multiple Choice) 20171110
Thread Content
Participation: Prize of 5 Wealth； Correct answer: Reward of 10 wealth points ； Note: This post is valid for 48 hours. Multiple-choice question: During the initial airtightness testing phase of the hydrogen system ( ). A. Hermetic sealing and gas displacement to be carried out simultaneously; B. Hermetic sealing first, followed by gas displacement, in order to save nitrogen; C. Air pressure testing first, then nitrogen displacement; D. Successful nitrogen displacement first, followed by hermetic sealing. The answer is D. Please take a moment to participate – 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 published 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
D. First, purge with nitrogen to ensure compliance, then check for airtightness
D. First, purge with nitrogen to ensure compliance, then check for airtightness
D. First, purge with nitrogen to ensure compliance, then check for airtightness