Mass Transfer Plate efficiency Increases due to foaming Increases due to weeping and dumping of liquid Increases due to liquid entrainment Is a function of the mass transfer between liquid and vapour Increases due to foaming Increases due to weeping and dumping of liquid Increases due to liquid entrainment Is a function of the mass transfer between liquid and vapour ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Reboiler is considered as one theoretical plate, because Reboiler itself contains one plate Vapour is recycled to the column Of the assumption that vapour and liquid leaving the reboiler are in equilibrium None of these Reboiler itself contains one plate Vapour is recycled to the column Of the assumption that vapour and liquid leaving the reboiler are in equilibrium None of these ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer A distillation column with N plates is being operated under normal conditions. At some point of time, the operation is shifted to total reflux condition (i.e., no product and residue are being withdrawn and feed to the column is stopped). At the new steady state, Composition of vapors and that of liquid do not vary throughout the column Reboiler load and condenser load are minimum The top and bottom compositions are unchanged with and without total reflux The top and bottom compositions correspond to the maximum enrichment available Composition of vapors and that of liquid do not vary throughout the column Reboiler load and condenser load are minimum The top and bottom compositions are unchanged with and without total reflux The top and bottom compositions correspond to the maximum enrichment available ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Can the efficiency of a plate in the distillation tower be greater than 100%? Normally not; but is possible if infinite number of plates are put Never Yes Yes ; if the reflux ratio is maximum Normally not; but is possible if infinite number of plates are put Never Yes Yes ; if the reflux ratio is maximum ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Lewis number, which is important in problems involving simultaneous heat and mass transfer, is the ratio of Mass diffusivity to momentum diffusivity Momentum diffusivity to thermal diffusivity None of these Thermal diffusivity to mass diffusivity Mass diffusivity to momentum diffusivity Momentum diffusivity to thermal diffusivity None of these Thermal diffusivity to mass diffusivity ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer In distillation columns, the number of bubble caps per tray primarily depends upon the Allowable gas velocity Allowable gas and liquid velocities Allowable liquid velocity Feed composition Allowable gas velocity Allowable gas and liquid velocities Allowable liquid velocity Feed composition ANSWER DOWNLOAD EXAMIANS APP
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