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11 years of professional expertise 47

2016-07-13View Original

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47. Which of the following unit operations do not involve heat transfer? A. Solid fluidization B. Heating and cooling C. Stirring D. Sedimentation. The textbooks from Tianjin University state that pneumatic conveying simultaneously involves operations such as crushing, grading, heating, cooling, and drying. Isn’t stirring also associated with heat transfer? Therefore, only D can be chosen

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