Mass Transfer Which of the following is the most suitable for extraction in a system having very low density difference? Mixer-settler extractor Pulsed extractor Packed extraction tower Centrifugal extractor Mixer-settler extractor Pulsed extractor Packed extraction tower Centrifugal extractor ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Can the efficiency of a plate in the distillation tower be greater than 100%? Yes Normally not; but is possible if infinite number of plates are put Never Yes ; if the reflux ratio is maximum Yes Normally not; but is possible if infinite number of plates are put Never Yes ; if the reflux ratio is maximum ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Plate efficiency Is a function of the mass transfer between liquid and vapour Increases due to foaming Increases due to weeping and dumping of liquid Increases due to liquid entrainment Is a function of the mass transfer between liquid and vapour Increases due to foaming Increases due to weeping and dumping of liquid Increases due to liquid entrainment ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer The relation among various mass transfer co-efficients (M.T.C) for ideal gases is given by (where, Kc & Km are M.T.C. for equimolar counter diffusion with concentration & mole fraction respectively as the driving force. and, Kp = M.T.C. for diffusion of a gas through a stagnant inert gas with pressure as driving force.) Kc = Kp = Km None of these Kc = Kp/RT = Km . RT/P Kc = Kp . RT = Km . RT/p Kc = Kp = Km None of these Kc = Kp/RT = Km . RT/P Kc = Kp . RT = Km . RT/p ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Which of the following liquid-vapor contacting devices provides maximum contact surface area for a particular duty? Sieve plate column Randomly packed column Wetted wall column Bubble cap column Sieve plate column Randomly packed column Wetted wall column Bubble cap column ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer In gas-liquid contact operation, the number of ideal stages, N = (xa - xb)/(xb - x*b) . This is true when the stripping factor 'S' is S > 1 S < 1 S = 1 S = ∞ S > 1 S < 1 S = 1 S = ∞ ANSWER DOWNLOAD EXAMIANS APP
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