Mass Transfer Out of the following gas-liquid contacting devices, for a given set of operating conditions, gas pressure drop is the least in __________ tower. Wetted wall Bubble cap Packed Perforated tray Wetted wall Bubble cap Packed Perforated tray ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer If the path of liquid across the plate is very long as in case of large diameter tower, Murphree efficiency can be __________ percent. 100 None of these > 100 < 100 100 None of these > 100 < 100 ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Absorption accompanied by heat evolution results in None of these Decrease in equilibrium solubility Increase in equilibrium solubility Increased capacity of the absorber None of these Decrease in equilibrium solubility Increase in equilibrium solubility Increased capacity of the absorber ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer At equilibrium the concentration of water in vapour phase (C*)in kg/m³ of air space and the amount of water (m) adsorbed per kg of dry silica gel are related by, C* = 0.0667m. To maintain dry conditions in a room of air space 100m³ containing 2.2 kg of water vapour initially, 10 kg of dry silica gel is kept in the room. The fraction of initial water remaining in the air space after a long time (during which the temperature is maintained constant) is 0.4 1 0.2 0.4 1 0.2 ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer The temperature to which a vapour gas mixture must be cooled (at varying humidity) to become saturated is called the __________ temperature. Wet bulb None of these Dry bulb Dew point Wet bulb None of these Dry bulb Dew point ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Entrainer used in azeotropic distillation should Have high latent heat of vaporisation Have high viscosity to provide high tray efficiency Form a low boiling azeotrope with one of the constituents of the mixture Form a new azeotrope of low relative volatility with one of the constituents of the mixture Have high latent heat of vaporisation Have high viscosity to provide high tray efficiency Form a low boiling azeotrope with one of the constituents of the mixture Form a new azeotrope of low relative volatility with one of the constituents of the mixture ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS