Mass Transfer Which of these columns incurs the lowest pressure drop? Packed column (with stacked packing) Pulse column Bubble plate column Packed column (with dumped packing) Packed column (with stacked packing) Pulse column Bubble plate column Packed column (with dumped packing) ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer To get high tray efficiency Liquid entrainment should be severe Interfacial surface between liquid and gas phase should be large Gas velocity should be very low Time of contact between the two phases should be less Liquid entrainment should be severe Interfacial surface between liquid and gas phase should be large Gas velocity should be very low Time of contact between the two phases should be less ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Penetration theory relates the average mass transfer co-efficient (K) with diffusivity (D) as K ∝ D1.5 K ∝ D K ∝ D2 K ∝ √D K ∝ D1.5 K ∝ D K ∝ D2 K ∝ √D ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer High pressure at the bottom of a distillation tower handling heat sensitive materials results in Erosion of the tower Thermal decomposition of bottoms Increased relative volatility Very efficient operation Erosion of the tower Thermal decomposition of bottoms Increased relative volatility Very efficient operation ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer In physical terms, Schmidt number means Momentum diffusivity/mass diffusivity Thermal diffusivity/momentum diffusivity Thermal diffusivity/mass diffusivity Mass diffusivity/thermal diffusivity Momentum diffusivity/mass diffusivity Thermal diffusivity/momentum diffusivity Thermal diffusivity/mass diffusivity Mass diffusivity/thermal diffusivity ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer In batch distillation with constant reflux, overhead product composition __________ with time. Increases May increase on decrease, depends on the system Decreases Does not vary Increases May increase on decrease, depends on the system Decreases Does not vary ANSWER DOWNLOAD EXAMIANS APP
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