Mass Transfer Lewis number, which is important in problems involving simultaneous heat and mass transfer, is the ratio of Thermal diffusivity to mass diffusivity 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 ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Unsaturated air (with dry bulb and wet bulb temperatures being 45°C and 25°C respectively) is passed through a water spray chamber maintained at 23°C. The air will be cooled and Humidified at constant wet bulb temperature Humidified with wet bulb temperature decreasing Dehumidified None of these Humidified at constant wet bulb temperature Humidified with wet bulb temperature decreasing Dehumidified None of these ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer The individual mass transfer co-efficients (moles/m² . s) for absorption of a solute from a gas mixture into a liquid solvent are, KL = 4.5 and KG = 1.5. The slope of the equilibrium line is 3. Which of the following resistance (s) is (are) controlling ? Gas side Liquid side Interfacial Both liquid and gas side Gas side Liquid side Interfacial Both liquid and gas side ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Which of the following decreases during evaporative cooling process with recirculated water supply? Wet bulb temperature Relative humidity Partial pressure of vapour None of these Wet bulb temperature Relative humidity Partial pressure of vapour None of these ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Molecular distillation is Very low pressure distillation Both B and C High temperature distillation For heat-sensitive materials Very low pressure distillation Both B and C High temperature distillation For heat-sensitive materials ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer For a distillation column operating at minimum reflux, the Concentration of liquid and vapour leaving a plate will be same Number of plates required will be maximum Reflux ratio will be maximum None of these Concentration of liquid and vapour leaving a plate will be same Number of plates required will be maximum Reflux ratio will be maximum None of these ANSWER DOWNLOAD EXAMIANS APP
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