Mass Transfer Prandtl number for water at 20°C is about 70 0.7 150 7 70 0.7 150 7 ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Which of the following increases during evaporative cooling process with recirculated water supply? Wet bulb temperature Relative humidity Both B and C Partial pressure of vapour Wet bulb temperature Relative humidity Both B and C Partial pressure of vapour ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer To remove all the moisture from a wet solid it requires exposure to __________ air. High temperature Highly humid Perfectly dry None of these High temperature Highly humid Perfectly dry None of these ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer When the solvent dissolves very little of solute, then Solvent of low latent heat of vaporisation should be used Solvent of low freezing point should be used Very small quantity of solvent is required Large quantity of solvent is required to extract the solute Solvent of low latent heat of vaporisation should be used Solvent of low freezing point should be used Very small quantity of solvent is required Large quantity of solvent is required to extract the solute ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer To increase the absorption factor, (where, G = gas flow rate, S = solvent flow rate) Decrease both 'G' and 'S' Increase 'G' and decrease 'S' Increase 'S' and decrease 'G' Increase both 'G' and 'S' Decrease both 'G' and 'S' Increase 'G' and decrease 'S' Increase 'S' and decrease 'G' Increase both 'G' and 'S' 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/RT = Km . RT/P 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 ANSWER DOWNLOAD EXAMIANS APP
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