Mass Transfer The mass transfer co-efficient for a solid sphere of radius 'a' dissolving in a large volume of quiescent liquid, in which D is the diffusivity of solute, is Dependent on the Reynolds number D/a Proportional to √D D/2a Dependent on the Reynolds number D/a Proportional to √D D/2a 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 Wetted wall column Randomly packed column Bubble cap column Sieve plate column Wetted wall column Randomly packed column Bubble cap column ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer The slope of the operating line for a single component co-current absorber when plotted in terms of mole ratio units is +ve ∞ -ve +ve ∞ -ve ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer In case of a desorber (stripper), the Temperature remains unaffected Operating line always lies above the equilibrium curve Temperature always increases Operating line always lies below the equilibrium curve Temperature remains unaffected Operating line always lies above the equilibrium curve Temperature always increases Operating line always lies below the equilibrium curve ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Flights in a rotary dryer are provided to Lift and shower the solids thus exposing it thoroughly to the drying action of the gas Reduce the residence time of solid None of these Increase the residence time of the solid Lift and shower the solids thus exposing it thoroughly to the drying action of the gas Reduce the residence time of solid None of these Increase the residence time of the solid ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer During constant rate period, the rate of drying decreases with the Decrease in air temperature Both A & B Increase in air humidity Neither A nor B Decrease in air temperature Both A & B Increase in air humidity Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
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