Mass Transfer Penetration theory states that the mass transfer co-coefficient is equal to (where, De is diffusivity and 't' is time) (4De/t) (De.t)1/2 (4De/πt)1/2 (De/t)1/2 (4De/t) (De.t)1/2 (4De/πt)1/2 (De/t)1/2 ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Low viscosity absorbent is preferred for reasons of Improved flooding characteristics Low pressure drop on pumping All of these Rapid absorption rates and good heat transfer characteristics Improved flooding characteristics Low pressure drop on pumping All of these Rapid absorption rates and good heat transfer characteristics ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer The cooling effect in a cooling tower can not be increased by Increasing the air velocity over the wet surfaces None of these Lowering the barometric pressure Reducing the humidity of entering air Increasing the air velocity over the wet surfaces None of these Lowering the barometric pressure Reducing the humidity of entering air ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer In case of liquid-liquid binary diffusion, diffusivity of one constituent into another is not dependent on the Nature of the constituents Concentration None of these Temperature and pressure Nature of the constituents Concentration None of these Temperature and pressure ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer When an unsaturated air-water mixture is heated at constant pressure, then The specific humidity decreases The relative humidity decreases The relative humidity increases The partial pressure of water vapour increases The specific humidity decreases The relative humidity decreases The relative humidity increases The partial pressure of water vapour increases ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer In case of constant underflow extraction operation, the __________ at all solute concentration. Neither A nor B Both A & B Ratio of the insoluble to solution is constant Solids are drained to the same extent Neither A nor B Both A & B Ratio of the insoluble to solution is constant Solids are drained to the same extent ANSWER DOWNLOAD EXAMIANS APP
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