Mass Transfer During constant rate drying period, vaporisation rate per unit drying surface area Decreases with time Increases with time Does not change with time Does not affect the moisture content of the wet solid Decreases with time Increases with time Does not change with time Does not affect the moisture content of the wet solid ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer A good solvent used for absorption should not have very high Viscosity All of these Freezing point Vapor pressure Viscosity All of these Freezing point Vapor pressure ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer In a distillation operation, what is the effect of the temperature of the reflux stream (given below) on the condenser and reboiler loads? Reflux conditions:(i) Reflux stream is completely liquid and is at its bubble point.(ii) Reflux stream is below its bubble point. Reboiler load is the same in both the cases but condenser load is higher in case (ii) Condenser load is the same in both the cases but reboiler load is higher in case (ii) Both condensor and reboiler loads are higher in case (ii) as compared to case (i) Condenser and reboiler loads are the same in both the cases Reboiler load is the same in both the cases but condenser load is higher in case (ii) Condenser load is the same in both the cases but reboiler load is higher in case (ii) Both condensor and reboiler loads are higher in case (ii) as compared to case (i) Condenser and reboiler loads are the same in both the cases ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer A 25 cm x 25 cm x 1 cm flat sheet weighing 1.2 kg initially was dried from both sides under constant drying rate conditions. It took 1500 seconds for the weight of the sheet to reduce to 1.05 kg. Another 1m x 1m x 1cm flat sheet of the same material is to be dried from one side only.Under the same constant drying rate conditions, the time required for drying (in seconds) from its initial weight of 19.2 kg to 17.6 kg is 1000 2500 2000 1500 1000 2500 2000 1500 ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer The binary diffusivity in gases at atmospheric conditions is about 10-4 cm²/seC₂ 10-9 cm/sec 10-1 cm²/sec 10-3 sec/cm 10-4 cm²/seC₂ 10-9 cm/sec 10-1 cm²/sec 10-3 sec/cm ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Physical absorption is Both B & C Accompanied by evolution of heat An irreversible phenomenon A reversible phenomenon Both B & C Accompanied by evolution of heat An irreversible phenomenon A reversible phenomenon ANSWER DOWNLOAD EXAMIANS APP
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