Mass Transfer The surface renewal frequency in Danckwerts model of mass transfer is given by (KL: mass transfer co-efficient) KL².DA KL/DA² KL²/DA √(KL².DA) KL².DA KL/DA² KL²/DA √(KL².DA) ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer What is the reflux ratio at total reflux? Data insufficient Unity Infinity Zero Data insufficient Unity Infinity Zero ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer For the same process conditions, the reflux ratio of an unlagged distillation column Increases in summer None of these Decreases in winter Increases in winter Increases in summer None of these Decreases in winter Increases in winter ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Drift in a cooling tower is Dependent on the water lost by evaporation All of these The water entrained by the circulating air Desirable Dependent on the water lost by evaporation All of these The water entrained by the circulating air Desirable ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Inside the distillation column, the Liquids are not always at their bubble points Pressure increases gradually from bottom to the top of the column None of these Driving force for the vapour flow is the pressure drop Liquids are not always at their bubble points Pressure increases gradually from bottom to the top of the column None of these Driving force for the vapour flow is the pressure drop ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer A coalescer in a mixer-settler liquid-liquid extraction coloumn Comprises of thin bed of substances of extended surface having high porosity Helps in increasing the bubble size entering the settler All of these Helps in increasing the settling rate of the bubbles Comprises of thin bed of substances of extended surface having high porosity Helps in increasing the bubble size entering the settler All of these Helps in increasing the settling rate of the bubbles ANSWER DOWNLOAD EXAMIANS APP
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