Mass Transfer — Part 2 MCQs with Explanations

Both enthalpy and material balances is the correct answer to “Ponchan-Savarit method analyses the fractional equipment based on”. This question is standard in competitive examination syllabi for Mass Transfer.

Its recovery cost by distillation may be prohibitatively high is the correct answer to “The solvent used in liquid extraction should not have high latent heat of vaporisation, because”. This question is standard in competitive examination syllabi for Mass Transfer.

High operating cost is the correct answer to “For absorbers, high pressure drop results in”. This question is standard in competitive examination syllabi for Mass Transfer.

Ideal gases is the correct answer to “The diffusivity, D AB (for component A diffusing in B) is equal to the diffusivity D BA (for component B diffusing in A) for a binary mixture of”. This question is standard in competitive examination syllabi for Mass Transfer.

High pressure drop of the gas is the correct answer to “Even though bubble cap towers are very effective for humidification operation, they are not used commonly in industries, because of the”. This question is standard in competitive examination syllabi for Mass Transfer.

Pachuka tank is the correct answer to “Which of the following equipments is not used in liquid-liquid extraction”. This question is standard in competitive examination syllabi for Mass Transfer.

Decreases is the correct answer to “With increase in temperature, the solubility of gases in liquids, at fixed pressure”. This question is standard in competitive examination syllabi for Mass Transfer.

Conveyor is the correct answer to “Dryer widely used in a textile industry is __________ dryer.”. This question is standard in competitive examination syllabi for Mass Transfer.

Both heat and mass is the correct answer to “Drying of a solid involves __________ transfer.”. This question is standard in competitive examination syllabi for Mass Transfer.

Carbon dioxide from gaseous stream using alkaline solution is the correct answer to “'Absorption with chemical reaction' is involved in the removal of”. This question is standard in competitive examination syllabi for Mass Transfer.

Porosity is the correct answer to “Most important factor to be considered in the selection of packings for absorbers is the __________ of packing.”. This question is standard in competitive examination syllabi for Mass Transfer.

Mechanical draft cooling tower is the correct answer to “Which of the following employs an accessory known as 'drift eliminator'”. This question is standard in competitive examination syllabi for Mass Transfer.

$$ - \frac{1}{{\text{f}}}$$ is the correct answer to “If f = moles of vapour present per mole of feed, then the slope of feed line is (Mcabe-Thiele method)”. This question is standard in competitive examination syllabi for Mass Transfer.

Both parallel and straight is the correct answer to “The assumption made in Elis method in distillation is that enthalpy concentration lines of vapor and liquid are”. This question is standard in competitive examination syllabi for Mass Transfer.

Plate is the correct answer to “__________ column is the most suitable for achieving the best performance for mass transfer operations involving liquid with dispersed solids.”. This question is standard in competitive examination syllabi for Mass Transfer.

Both gas as well as liquid streams should be distributed uniformly is the correct answer to “In a gas-liquid absorption coloumn, for obtaining the maximum absorption efficiency”. This question is standard in competitive examination syllabi for Mass Transfer.

2 is the correct answer to “The reflux to a distillation column is 100 moles/hr, when the overhead product rate is 50 moles/hr. The reflux ratio is”. This question is standard in competitive examination syllabi for Mass Transfer.

Area between operating line and 45° diagonal x-y diagram is the correct answer to “In case of binary distillation, increasing the reflux ratio above optimum does not result in the increase of”. This question is standard in competitive examination syllabi for Mass Transfer.

Plug is the correct answer to “The ratio of Murphree plate efficiency to point efficiency is always > 1 in a __________ flow model.”. This question is standard in competitive examination syllabi for Mass Transfer.

Spray towers is the correct answer to “Which of the following equipments is not used for gas dispersion”. This question is standard in competitive examination syllabi for Mass Transfer.

Heat and mass is the correct answer to “The relation, Sc = Pr = 1, is valid, when the mechanism of __________ ansfer is same.”. This question is standard in competitive examination syllabi for Mass Transfer.

Operating line always lies below the equilibrium curve is the correct answer to “In case of a desorber (stripper), the”. This question is standard in competitive examination syllabi for Mass Transfer.

Line always lies above the equilibrium curve is the correct answer to “In case of an absorber, the operating”. This question is standard in competitive examination syllabi for Mass Transfer.

All of the above is the correct answer to “Dew point of an air-water vapor mixture”. This question is standard in competitive examination syllabi for Mass Transfer.

Pulsed column is the correct answer to “__________ extractor is used for the concentration of radioactive nuclear waste.”. This question is standard in competitive examination syllabi for Mass Transfer.

Electrical resistance is the correct answer to “Psychrometry deals with the properties of gas-vapor mixture. Humidity can be determined by the measurement of the __________ of a fibre.”. This question is standard in competitive examination syllabi for Mass Transfer.

The ratio of number of ideal plates to actual plates is the correct answer to “Overall efficiency of the distillation column is”. This question is standard in competitive examination syllabi for Mass Transfer.

Dew point is the correct answer to “__________ is the temperature at which a gas-vapor mixture becomes saturated, when cooled at constant total pressure out of contact with a liquid.”. This question is standard in competitive examination syllabi for Mass Transfer.

All of the above is the correct answer to “Advantage of continuous drying over batch drying is that the”. This question is standard in competitive examination syllabi for Mass Transfer.

Both B and C is the correct answer to “Channelling in a packed tower results from the”. This question is standard in competitive examination syllabi for Mass Transfer.

None of these is the correct answer to “Pick out the wrong statement. Generally for physical adsorption, a gas of”. This question is standard in competitive examination syllabi for Mass Transfer.

Decreases with decrease in pressure is the correct answer to “Dew point of a gas-vapour mixture”. This question is standard in competitive examination syllabi for Mass Transfer.

Large weight of liquid retained is the correct answer to “Which of the following is an undesirable property in a tower packing”. This question is standard in competitive examination syllabi for Mass Transfer.

1.25 to 2 is the correct answer to “The most economical range of absorption factor is”. This question is standard in competitive examination syllabi for Mass Transfer.

Both A and B is the correct answer to “With increase in temperature, the leaching rate increases because of the”. This question is standard in competitive examination syllabi for Mass Transfer.

More readily done in the second case compared to first one is the correct answer to “Out of two equilibrium curves, first one lies above the diagonal and the second lies below the diagonal in the x-y plot. It means that separation by distillation is”. This question is standard in competitive examination syllabi for Mass Transfer.

Percolation is the correct answer to “Leaching of coarse solid lumps is also termed as”. This question is standard in competitive examination syllabi for Mass Transfer.

Both A and B is the correct answer to “Critical humidity of a solid salt means the humidity”. This question is standard in competitive examination syllabi for Mass Transfer.

Elution is the correct answer to “The process employing desorption of the absorbed solute by a solvent is called”. This question is standard in competitive examination syllabi for Mass Transfer.

3 is the correct answer to “Degree of freedom for leaching and solvent extraction process is”. This question is standard in competitive examination syllabi for Mass Transfer.