Mass Transfer Which of the following processes is followed by unsaturated air (with dry bulb temperature 12°C and relative humidity 47%) passing through water spray washer (temperature of water being constant at 40°C? Evaporative cooling Humidification only Both heating and humidification Heating only Evaporative cooling Humidification only Both heating and humidification Heating only ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Penetration theory relates the average mass transfer co-efficient (K) with diffusivity (D) as K ∝ D2 K ∝ √D K ∝ D1.5 K ∝ D K ∝ D2 K ∝ √D K ∝ D1.5 K ∝ D ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer According to the Fenske equation, what will be the minimum number of plates required in a distillation column to separate an equimolar binary mixture of components A and B into an overhead fraction containing 99 mol% A and a bottom fraction containing 98 mol% B? Assume that relative volatility (αAB = 2) does not change appreciably in the coloumn. 10 8 6 12 10 8 6 12 ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Acetone is to be removed from air in an isothermal dilute absorber using pure water as solvent. The incoming air contains 5 mole% of acetone (yin = 0.05). The design equation to be used for obtaining the number of trays (N) of the absorber is, N+2 = 6 log (yin/yout).For 98% recovery of acetone, the number of trays required is/are 1 9 8 10 1 9 8 10 ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer In continuous distillation, the internal reflux ratio (Ri) and the external reflux ratio (Re) are related as Ri = (1 - Re)/Re Ri = Re/(1 + Re) Ri = Re Ri = Re/(1 - Re) Ri = (1 - Re)/Re Ri = Re/(1 + Re) Ri = Re Ri = Re/(1 - Re) ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer A good solvent used for absorption should not have very high All of these Viscosity Vapor pressure Freezing point All of these Viscosity Vapor pressure Freezing point ANSWER DOWNLOAD EXAMIANS APP
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