Mass Transfer Mechanism of moisture removal in case of freeze drying of food stuff is by Dehydration Sublimation Adsorption Evaporation Dehydration Sublimation Adsorption Evaporation ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer H₂S is being absorbed in a gas absorber unit. The height of the transfer unit based on the overall mass transfer coefficient on the gas side is 0.4 m. The equilibrium data is given by, y = 1.5 x. The bulk concentration of H₂S has to be reduced from 0.05 to 0.001 mole fraction in the gas side. The height of the tower (in metres) corresponding to an operating line given by, y = 5x + 0.001 is 1.56 2 0.56 1 1.56 2 0.56 1 ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer If G = insoluble gas in gas stream and L = non-volatile solvent in liquid stream, then the slope of the operating line for the absorber is None of these L/G Always < 1 G/L None of these L/G Always < 1 G/L ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer When an unsaturated air-water mixture is heated at constant pressure, then The relative humidity increases The specific humidity decreases The relative humidity decreases The partial pressure of water vapour increases The relative humidity increases The specific humidity decreases The relative humidity decreases The partial pressure of water vapour increases ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer If the specific heats of a gas and a vapor are 0.2KJ/Kg.°K and 1.5 KJ/Kg.°K respectively, and the humidity is 0.01; the humid heat in KJ/°Kg. is 0.017 0.31 0.215 0.107 0.017 0.31 0.215 0.107 ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer McCabe-Thiele method Can use any type of units Uses molal units for material and energy balance Uses weight fractions to express liquid and vapour composition Is more accurate than Ponchan-Savarit method Can use any type of units Uses molal units for material and energy balance Uses weight fractions to express liquid and vapour composition Is more accurate than Ponchan-Savarit method ANSWER DOWNLOAD EXAMIANS APP
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