Mass Transfer Penetration theory relates the average mass transfer co-efficient (K) with diffusivity (D) as K ∝ D K ∝ D1.5 K ∝ D2 K ∝ √D K ∝ D K ∝ D1.5 K ∝ D2 K ∝ √D ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Priming in a distillation column Is characterised by the presence of foam throughout the space between trays Reduces the overall pressure drop Results from very low gas velocity Is desirable from point efficiency consideration Is characterised by the presence of foam throughout the space between trays Reduces the overall pressure drop Results from very low gas velocity Is desirable from point efficiency consideration ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer The drying time between fixed moisture contents within the 'constant rate period' is proportional to (assuming that drying occurs from all surfaces of the solid) (where, T = thickness of the solid ) T1.5 √T T T3 T1.5 √T T T3 ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer As the reflux ratio increases, the slope of the operating line for rectifying section Decreases Data insufficient, cannot be predicted Increases Remains constant Decreases Data insufficient, cannot be predicted Increases Remains constant ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer In azeotropic mixture, the equilibrium vapour composition is Same as liquid composition Less than liquid composition More than liquid composition None of the listed here Same as liquid composition Less than liquid composition More than liquid composition None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Compound A is extracted from a solution of A + B into a pure solvent S. A Co-current unit is used for the liquid-liquid extraction. The inlet rate of the solution containing A is 200 moles of B/hr.m² and the solvent flow, rate is 400 moles of S/m². hr. The equilibrium data is represented by Y = 3X² , where Y is in moles of a A/moles of B and X is in moles A/moles of S. The maximum percentage extraction achieved in the unit is 0.7 0.25 0.9 0.5 0.7 0.25 0.9 0.5 ANSWER DOWNLOAD EXAMIANS APP
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