【Learn Ethylene Together】Five questions per day to easily learn about ethylene 26

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【Learn Ethylene Together】Five questions per day to easily learn about ethylene – plus one extra question. 30. Compared to gas-phase hydrogenation of terpenes, liquid-phase hydrogenation of terpenes… ( ) a. High reaction pressure b. Large reactor volume c. High catalyst loading capacity d. Low space velocity 31. To reduce the acetylene content in the pyrolysis gas, then . ( ) a. Increase the cracking depth b. Increase the cracking temperature c. Extend the residence time d. Increase the hydrocarbon partial pressure. 32. Full-range hydrogenation is suitable for situations where the acetylene content is less than . （） a、0.5% b、1% c、1.5% 33、Product hydrogenation is suitable for situations where the acetylene content is less than . ( ) a、0.5% b、1% c、1.5% 34、Ethane cracking always uses . ( ) a. Gas-phase feeding method b. Liquid-phase feeding method 35. When switching the lubricating oil filter, attention should be paid to ( ). A. Fill the spare filter with fluid and release air from it. B. Switch the six-way valve quickly to prevent too rapid a drop in pressure due to an excessively small valve seat area. C. All oil from the spare filter must be drained. D. Rotate the handle by 180 degrees. 30. Compared to gas-phase hydrogenation of terpenes, liquid-phase hydrogenation of terpenes… (c) a. High reaction pressure b. Large reactor volume c. High catalyst loading capacity d. Low space velocity. 31. To reduce the acetylene content in the pyrolysis gas, then . (c) a. Increase the degree of cracking; b. Increase the cracking temperature; c. Extend the residence time; d. Increase the hydrocarbon partial pressure. 32. Full-range hydrogenation is suitable for situations where the acetylene content is less than . (a) a. 0.5% b. 1% c. 1.5% 33. Product hydrogenation is suitable for situations where the acetylene content is less than . (c) a. 0.5% b. 1% c. 1.5% 34. Ethane cracking always uses . (a) a. Gas-phase feeding method; b. Liquid-phase feeding method. 35. When switching the lubricating oil filter, attention should be paid to (　　). A. Fill the spare filter with fluid and release air from it. B. Switch the six-way valve quickly to prevent too rapid a drop in pressure due to an excessively small valve core area. C. The oil in the spare filter should be completely drained. D. Rotate the handle by 180 degrees. Answer: A