Mass Transfer Back-trapping in a distillation column Is desirable, as it provides improved vapour-liquid contact Reduces pressure drop Decreases tray efficiency Increases tray efficiency Is desirable, as it provides improved vapour-liquid contact Reduces pressure drop Decreases tray efficiency Increases tray efficiency ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Molecular distillation is Both B and C For heat-sensitive materials High temperature distillation Very low pressure distillation Both B and C For heat-sensitive materials High temperature distillation Very low pressure distillation 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) Composition of the residue remains unchanged More number of trays are required but the residue composition remains unchanged Less number of trays are required More number of trays are required and the residue composition is more dilute in methanol Composition of the residue remains unchanged More number of trays are required but the residue composition remains unchanged Less number of trays are required More number of trays are required and the residue composition is more dilute in methanol ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Mass transfer co-efficient is defined as Co-efficient = Flux/concentration difference Flux = Co-efficient/concentration difference Flux=concentration difference/co-effi-cient None of the listed here Co-efficient = Flux/concentration difference Flux = Co-efficient/concentration difference Flux=concentration difference/co-effi-cient None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Molecular diffusivity of a liquid Decreases with temperature Increases with temperature Is independent of temperature May increase or decrease with temperature Decreases with temperature Increases with temperature Is independent of temperature May increase or decrease with temperature ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Dry bulb temperature of unsaturated air is more than its __________ temperature. Dew point Neither A nor B Both A & B Wet bulb Dew point Neither A nor B Both A & B Wet bulb ANSWER DOWNLOAD EXAMIANS APP
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