【Daily Question No. 038】2017.08.14

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【Daily Question No. 038】August 14, 2017. The main purpose of pre-cooling is ( ). A. To check whether the quality of low-temperature materials and the quality of welding are satisfactory； B. Check the cold shrinkage of pipes and changes in bracket support ； C. Check the sealing performance of the low-temperature valve ； D. Bring the pump, air compressor, and process pipelines into operational condition ； The reference answers will be visible after responding; points are awarded by identifying the key points. After 7 days of daily activities, it shuts down and shows the answers automatically. D 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 Petrochemical Sector – “Creative Ideas for Energy Savings” campaign (the second phase is in full swing) http://bbs.hcbbs.com/thread-1666758-1-1.html (Source: Haichuan Chemical Industry Forum)