Mass Transfer Lewis number, which is important in problems involving simultaneous heat and mass transfer, is the ratio of Mass diffusivity to momentum diffusivity None of these Momentum diffusivity to thermal diffusivity Thermal diffusivity to mass diffusivity Mass diffusivity to momentum diffusivity None of these Momentum diffusivity to thermal diffusivity Thermal diffusivity to mass diffusivity ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer In rectifying section of a continuous distillation column, the Vapour is enriched with low boilers Vapour is enriched with high boilers Liquid is stripped of high boilers None of these Vapour is enriched with low boilers Vapour is enriched with high boilers Liquid is stripped of high boilers None of these ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer For a distillation column operating at minimum reflux, the Reflux ratio will be maximum Concentration of liquid and vapour leaving a plate will be same Number of plates required will be maximum None of these Reflux ratio will be maximum Concentration of liquid and vapour leaving a plate will be same Number of plates required will be maximum None of these ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Which of the following same diameter columns gives lowest pressure drop per unit height? Bubble-cap column Packed column (stacked) Sieve-plate column Randomly packed column Bubble-cap column Packed column (stacked) Sieve-plate column Randomly packed column ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Tower diameter may be decreased by Increasing the vapour flow rate Using higher reflux ratio Use of increased tray spacing Increasing the liquid flow rate Increasing the vapour flow rate Using higher reflux ratio Use of increased tray spacing Increasing the liquid flow rate ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer For a fixed number of ideal stages in a distillation column, as the reflux ratio is increased, the difference in composition between the top and bottom product streams Remains unaffected Passes through a maximum Increases Decreases Remains unaffected Passes through a maximum Increases Decreases ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS