Mass Transfer Mass transfer co-efficient (K) and diffusivity (D) are related according to film theory as K ∝ D2 K ∝ D K ∝ √D K ∝ D1.5 K ∝ D2 K ∝ D K ∝ √D K ∝ D1.5 ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer In gas-liquid contact operation, the number of ideal stages, N = (xa - xb)/(xb - x*b) . This is true when the stripping factor 'S' is S < 1 S = 1 S > 1 S = ∞ S < 1 S = 1 S > 1 S = ∞ ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Stacked packing compared to dumped packing Gives lower pressure drop Gives higher pressure drop Both A & B Provides poorer contact between the fluids Gives lower pressure drop Gives higher pressure drop Both A & B Provides poorer contact between the fluids ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Which of the following unit operations makes use of Thiele-Geddes equation? Multicomponent distillation Multicomponent absorption with chemical reaction Solid-liquid extraction Liquid-liquid extraction Multicomponent distillation Multicomponent absorption with chemical reaction Solid-liquid extraction Liquid-liquid extraction ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Which of the following psychrometric processes is followed by water vapour laden unsaturated air, when it is passed through solid or liquid adsorbent? Cooling and dehumidification Dehumidification with dry bulb temperature remaining constant Heating and dehumidification at almost constant wet bulb temperature None of these Cooling and dehumidification Dehumidification with dry bulb temperature remaining constant Heating and dehumidification at almost constant wet bulb temperature None of these ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer The surface renewal frequency in Danckwerts model of mass transfer is given by (KL: mass transfer co-efficient) KL/DA² KL².DA KL²/DA √(KL².DA) KL/DA² KL².DA KL²/DA √(KL².DA) ANSWER DOWNLOAD EXAMIANS APP
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