Mass Transfer In a forced draft cooling tower, water is cooled from 95 to 80°F by exposure to air with a wet bulb temperature of 70°F. In this case, the Approach is 10°F Neither A nor B Both A & B Range is 15°F Approach is 10°F Neither A nor B Both A & B Range is 15°F ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer The cooling effect in a cooling tower can be speeded up by Reducing the humidity of the air Reducing the barometric pressure Increasing the air velocity and area of exposed wet surface All of the listed here Reducing the humidity of the air Reducing the barometric pressure Increasing the air velocity and area of exposed wet surface All of the listed here ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer An aqueous solution of methanol is to be distilled in a tray column. High pressure steam is available as a source of heat. For a given reflux ratio and overhead composition, two options are being explored; (i) a reboiler is used and (ii) no reboiler is used but steam is fed directly to the bottom of the column. As compared to option (i), in option (ii) Composition of the residue remains unchanged Less number of trays are required More number of trays are required but the residue composition remains unchanged More number of trays are required and the residue composition is more dilute in methanol Composition of the residue remains unchanged Less number of trays are required More number of trays are required but the residue composition remains unchanged More number of trays are required and the residue composition is more dilute in methanol ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Mass transfer co-efficient is directly proportional to DAB according to the __________ theory. Film Penetration None of these Surface-renewal Film Penetration None of these Surface-renewal ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Which of the following is not fixed by the process requirements, in the design of absorbers? None of these Terminal concentrations of gas stream Composition of the entering liquid Flow rate of the entering gas None of these Terminal concentrations of gas stream Composition of the entering liquid Flow rate of the entering gas ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Absorption accompanied by heat evolution results in Increase in equilibrium solubility Increased capacity of the absorber Decrease in equilibrium solubility None of these Increase in equilibrium solubility Increased capacity of the absorber Decrease in equilibrium solubility None of these ANSWER DOWNLOAD EXAMIANS APP
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