Mass Transfer Penetration theory relates the average mass transfer co-efficient (K) with diffusivity (D) as K ∝ D2 K ∝ √D K ∝ D1.5 K ∝ D K ∝ D2 K ∝ √D K ∝ D1.5 K ∝ D ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer It takes 6 hours to dry a wet solid from 50% moisture content to the critical moisture content of 15%. How much longer it will take to dry the solid to 10% moisture content, under the same drying conditions? (The equilibrium moisture content of the solid is 5%). 15 min 94 min 51 min 71 min 15 min 94 min 51 min 71 min ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer The binary diffusivity in gases at atmospheric conditions is about 10-1 cm²/sec 10-3 sec/cm 10-4 cm²/seC₂ 10-9 cm/sec 10-1 cm²/sec 10-3 sec/cm 10-4 cm²/seC₂ 10-9 cm/sec ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Flights in a rotary dryer are provided to None of these Lift and shower the solids thus exposing it thoroughly to the drying action of the gas Reduce the residence time of solid Increase the residence time of the solid None of these Lift and shower the solids thus exposing it thoroughly to the drying action of the gas Reduce the residence time of solid Increase the residence time of the solid ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Lewis number, which is important in problems involving simultaneous heat and mass transfer, is the ratio of Momentum diffusivity to thermal diffusivity Thermal diffusivity to mass diffusivity None of these Mass diffusivity to momentum diffusivity Momentum diffusivity to thermal diffusivity Thermal diffusivity to mass diffusivity None of these Mass diffusivity to momentum diffusivity ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer The adiabatic saturation curve for a vapour-gas mixture is Straight line Slightly concave upward Slightly concave downward None of these Straight line Slightly concave upward Slightly concave downward None of these ANSWER DOWNLOAD EXAMIANS APP
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