【Test Your Knowledge】Basic Chemical Engineering Knowledge (154) – Please hide your replies.

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This post was last edited by wbp on 2009-8-9 at 15:19. In accordance with the forum’s guidelines, the maximum score for this activity is 15 Wealth points; giving scores based on charm is prohibited. At the same time, friendship requests and repeated ratings are declined. To encourage active participation from members, the top 5 correct answers receive a full score; for the remaining answers, 10–15 wealth points are awarded for every correct answer, while 8–12 wealth points are given for each incorrect answer. 2 mistakes result in a loss of 6–10 wealth points; the remaining mistakes earn a bonus of 2–6 wealth points as an incentive for participation. 1 When the temperature during the extraction process increases, the area of the two-phase region in the ternary phase diagram will ( ). A. Increase B. Remain unchanged C. Decrease D. Decrease first, then increase. 2 In a packed extraction tower, the packing should usually be wetted preferentially by (　　). A. Continuous phase B. Dispersed phase C. Extraction phase D. Residual phase 3. What type of membrane is used in electrodialysis? A. Microporous membrane B. Asymmetric membrane C. Liquid membrane D. Ion exchange membrane 4. For reactions involving materials that tend to stick to the reactor walls, which type of agitator is suitable? A. Paddle type B. Anchor type C. Turbine type D. Shaft type 5. For reactions with a reaction order n greater than zero, in order to reduce the volume of the reactor, which type should be used? A. Plug flow reactor B. Complete mix reactor C. Circulating plug flow reactor D. Complete mix reactor combined with a plug flow reactor 6. 36. Which type of membrane module is capable of handling liquids that contain suspended solids, have high viscosity, or may produce solids that can clog the liquid flow channels? A. Plate and frame type B. Spiral wound type C. Circular tube type D. Hollow fiber type 7. The solution suitable for processing in a falling film evaporator is ( ) A. Solutions prone to scaling ； B. Solution with crystal precipitation C. Solution with high viscosity, heat sensitivity, no crystal precipitation, and low tendency to scale ； D. Solutions that are prone to scaling and crystal precipitation. 8 To improve the evaporation capacity of the evaporator, it is possible to ( ). A. Use multi-effect evaporation. B. Increase the convective heat transfer coefficient on the heating steam side. C. Increase the heat exchange area. D. Improve the convective heat transfer coefficient on the boiling side. 9. There is a four-effect evaporation system; the cold liquid feed enters the third effect, then passes through the fourth effect, the second effect, and finally the first effect to complete evaporation. It can be concluded that vaporization will occur at (　　). A. First effect B. Second effect C. Third effect D. Fourth effect 10 During the crystallization process, by keeping the solution in an unstable region with a high supersaturation level, crystals with （ ） properties can be obtained. A. The particle size is very small ； B. Large and uniform particle size ； C. The particle sizes vary ； D. It cannot be determined. All members now have the permission to use hidden replies; please cooperate actively. Starting from this issue, no scoring will be given in principle without hiding it. Thank you all! Also, be careful when posting – edits are invalid! To hide the method, click here: Hide Method. Answers for Issue 154: cadba ccdda