Mass Transfer In distillation column design, the McCabe-Thiele procedure is inadequate and a Ponchan-Savarit procedure is needed, when The latent heat of vaporisation of the more and less volatile components are greatly different An azeotrope forms A total condenser is used Saturated feed is not used The latent heat of vaporisation of the more and less volatile components are greatly different An azeotrope forms A total condenser is used Saturated feed is not used ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Which of the following is used for the concentration of rubber latex? Short tube evaporator Calendria Agitated film evaporator Long tube vertical evaporator Short tube evaporator Calendria Agitated film evaporator Long tube vertical evaporator ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Diffusion co-efficient generally depends upon the temperature, pressure & the nature of the components of the system. Its dimension is not the same as that of the Mass transfer co-efficient Kinematic viscosity Volumetric diffusivity Thermal diffusivity Mass transfer co-efficient Kinematic viscosity Volumetric diffusivity Thermal diffusivity 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. 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 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) ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer An aqueous solution of methanol is to be distilled in a tray column. High pressure steam is available as a source of heat. For a given reflux ratio and overhead composition, two options are being explored; (i) a reboiler is used and (ii) no reboiler is used but steam is fed directly to the bottom of the column. As compared to option (i), in option (ii) More number of trays are required and the residue composition is more dilute in methanol Composition of the residue remains unchanged Less number of trays are required More number of trays are required but the residue composition remains unchanged More number of trays are required and the residue composition is more dilute in methanol Composition of the residue remains unchanged Less number of trays are required More number of trays are required but the residue composition remains unchanged ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer When the solvent dissolves very little of solute, then Very small quantity of solvent is required Solvent of low latent heat of vaporisation should be used Solvent of low freezing point should be used Large quantity of solvent is required to extract the solute Very small quantity of solvent is required Solvent of low latent heat of vaporisation should be used Solvent of low freezing point should be used Large quantity of solvent is required to extract the solute ANSWER DOWNLOAD EXAMIANS APP
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