17. True/False: Agitated vessels are used in gas-solid liquid mixtures primarily to enhance mixing and mass transfer.
18. True/False: The pressure drop in packed beds is not influenced by the properties of the packed solids and fluid flow rates.
19. True/False: The modification of the drift flux model for liquid-liquid flows in mini channels ignores the effects of surface tension.
20. True/False: Fluidized beds operate on the principle that solid particles can be suspended by upward-flowing fluid.