[Oil Transport Quiz with Prizes] 40

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This post was last edited by 18 on 2009-8-10 23:25 as a true/false question. 5 questions per day; 2 wealth points for answering one question correctly, and an additional 5 wealth points if all questions are answered correctly. To prevent some members from copying other members’ answers, please hide your posts when answering questions. For specific hiding methods, see: http://bbs.hcbbs.com/viewthread.php?tid=492556&highlight=%D2%FE%B2%D8 41. Closed-loop oil transportation allows the oil transfer capacities of various stations to complement each other. 42. The flow rates at various stations in a closed oil pipeline can vary. 43. Closed-loop oil transportation eliminates oil leakage losses caused by connecting oil tanks at intermediate stations. 44. After a water hammer occurs, overpressure accidents are likely to happen upstream in the pipeline. 45. The sudden change in pipeline pressure caused by a sudden change in the flow rate of oil in the pipeline for some reason is known as water hammer phenomenon. Answer: 41.√ 42.× The flow rate at each station in a closed oil transportation pipeline must be the same. 43. × Closed oil transfer prevents evaporation losses caused by the oil storage tanks connected beside the pumping station. 44.√ 45.√