Questions on Knowledge (Technology) in Petrochemical and Natural Gas Chemical Engineering, April 19, 2010

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This post was last edited by lijianhuai on 2011-9-10 at 11:21. Questions on knowledge (technology) in the petrochemical and natural gas chemical industries, April 19, 2010. The maximum score for this activity is 20 points; friendly votes and repeated voting are not allowed. Please be careful when posting – edits will not be counted as scores! To prevent the answers of some members from affecting others, all members are asked to hide their own posts when answering questions. Thank you for your cooperation. For specific hiding methods, see: http://bbs.hcbbs.com/viewthread.php?tid=492556&highlight=%D2%FE%B2%D8 Thank you all for your participation! Learn more*, communicate more, gain more! 1. The principle for emptying the equipment is ( ). A. Drain the liquid first, then release pressure. B. Release pressure first, then drain the liquid. C. Drain the liquid and release pressure simultaneously. D. The order does not matter. 2. The adsorption capacity of the carbon dioxide hydrogenation catalyst for different hydrocarbons is arranged in the following ( ) order. A. Alkanes > Monoenes ≥ Alkenes > Alkynes B. Alkynes > Monoenes ≥ Alkenes > Alkanes C. Alkynes ≥ Alkenes > Monoenes > Alkanes D. Alkanes > Alkynes > Alkenes ≥ Monoenes 3. The main factor that determines the cross-temperature in a cracking furnace is ( ). A Furnace type B Heat load C Flue gas volume D Raw material properties 4. During startup, the oxygen content in the system should be less than ( ) to be considered acceptable. A ＜0.3％(V) B ＜1.0％(V) C ＜0.2％(V) D ＜0.5％(V) 5. The design basis for the flare system is ( ). A. Emissions from the cold water tower top; B. Emissions from the propylene distillation tower top; C. Emissions from the cold water tower top plus the total emissions from the propylene compressor outlet; D. Emissions from the cold water tower top plus the total emissions from the acetylene hydrogenation reactor. 1. A, 2. C, 3. D, 4. C, 5. C