Mass Transfer As the reflux ratio, in a continuous counter-current extraction is increased, the number of stages Remain unchanged Increase Can either increase or decrease, depends on the system Decrease Remain unchanged Increase Can either increase or decrease, depends on the system Decrease ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Unsaturated air (with dry and wet bulb temperatures being 35 and 25°C respectively) is passed through water spray chamber maintained at 35°C. The air will be Dehumidified Cooled Humidified Both A & B Dehumidified Cooled Humidified Both A & B ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer The mass diffusivity, the thermal diffusivity and the eddy momentum diffusivity are same for, NPr = NSc = __________ 2 4 3 1 2 4 3 1 ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Compound A is extracted from a solution of A + B into a pure solvent S. A Co-current unit is used for the liquid-liquid extraction. The inlet rate of the solution containing A is 200 moles of B/hr.m² and the solvent flow, rate is 400 moles of S/m². hr. The equilibrium data is represented by Y = 3X² , where Y is in moles of a A/moles of B and X is in moles A/moles of S. The maximum percentage extraction achieved in the unit is 0.5 0.7 0.25 0.9 0.5 0.7 0.25 0.9 ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Weeping in a distillation column Results due to very high gas velocity Results due to very low gas velocity Provides large interfacial surface for mass transfer Increases tray efficiency Results due to very high gas velocity Results due to very low gas velocity Provides large interfacial surface for mass transfer Increases tray efficiency ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer In case of liquids, the binary diffusivity is proportional to (where, T = temperature) T 1/T T² √T T 1/T T² √T ANSWER DOWNLOAD EXAMIANS APP
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