How to solve the 22 questions in the afternoon of the second day of the chemical injection major in 2013?
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22. A certain project requires 20 tons of oil per hour and plans to supply it through pipeline transportation. It is known that the density of the oil is 900kg/m3 and the viscosity is 72×10-3 (Pa. S), now φ108×4mm steel pipes are installed horizontally for transportation, with a total length of 45km. Because the pipeline is long, the local resistance can be ignored, but the maximum pressure designed for the steel pipe is 5.0MPa (G). Try to judge whether it is necessary to add a booster station during the transportation. Which of the following results is correct? (A) No need to add (B) Add 1 (C) Add 2 (D) Add 3
Choose B http://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1327719