Mass Transfer Lewis number, which is important in problems involving simultaneous heat and mass transfer, is the ratio of Thermal diffusivity to mass diffusivity Momentum diffusivity to thermal diffusivity Mass diffusivity to momentum diffusivity None of these Thermal diffusivity to mass diffusivity Momentum diffusivity to thermal diffusivity Mass diffusivity to momentum diffusivity None of these ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer At a fixed pressure, the humidity depends upon the partial pressure of vapor in the mixture. Humidity of a vapour free gas is __________ percent. Between 0 and 100 100 50 Between 0 and 100 100 50 ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer The mass transfer co-efficient for a solid sphere of radius 'a' dissolving in a large volume of quiescent liquid, in which D is the diffusivity of solute, is D/2a Dependent on the Reynolds number Proportional to √D D/a D/2a Dependent on the Reynolds number Proportional to √D D/a ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer As the reflux ratio in a distillation coloumn is increased from the minimum, the Total cost first decreases and then increases Liquid flow increases while the vapor flow decreases for a system Number of plates decreases very slowly first and then more and more rapidly Slope of the operating line in stripping section decreases Total cost first decreases and then increases Liquid flow increases while the vapor flow decreases for a system Number of plates decreases very slowly first and then more and more rapidly Slope of the operating line in stripping section decreases ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer In stripping section of continuous distillation column, the Liquid is enriched with high boiler None of these Vapour is stripped of low boiler Liquid is stripped of high boiler Liquid is enriched with high boiler None of these Vapour is stripped of low boiler Liquid is stripped of high boiler ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer For the air water system under ambient conditions, the adiabatic saturation temperature and the wet bulb temperature are nearly equal, because They are always equal under all circumstances Water has a high latent heat of evaporation Lewis number is close to unity Solubility of the components of air in water is very small They are always equal under all circumstances Water has a high latent heat of evaporation Lewis number is close to unity Solubility of the components of air in water is very small ANSWER DOWNLOAD EXAMIANS APP
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