【Daily Question No. 074】March 15, 2017

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This post was last edited by 955559 on 2017-7-21 at 22:17. [Daily Question No. 074] On 2017.03.15, after the compressor was overhauled, the cylinders and the inlet and outlet pipelines were filled with (). When such flammable gases mix with air, during operation the pressure and temperature rise to a certain level, which can lead to spontaneous ignition or explosion. Therefore, the tank and pipelines must be purged before starting up. A. Hydrogen B. Air C. Nitrogen D. Hydrocarbon gases. The reference answers will be visible after responding; scoring is possible by identifying the key points. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) B 2017 Q&A Summary Thread (updates have begun) http://bbs.hcbbs.com/thread-1657793-1-1.html 2017 Daily Question Summary Thread (updates have begun) http://bbs.hcbbs.com/thread-1657794-1-1.html 2016 Q&A Summary Thread (updates completed) http://bbs.hcbbs.com/thread-1597792-1-1.html Third Round of Haichuan Outstanding Management Members Selection Contest http://bbs.hcbbs.com/thread-1655902-1-1.html (Source: Haichuan Chemicals Forum)