Mass Transfer Quiz 13

Which of the following operations does not involve leaching ?

Which of the following same diameter columns gives lowest pressure drop per unit height ?

Which one of the following devices is not used for both the absorption as well as the liquidliquid extraction processes ?

With increase in pressure, the relative volatility for a binary system___________?

Which of the following is directly concerned with Psychrometry ?

Which of the following equipments is not used in liquid-liquid extraction ?

Which of the following provides maximum contact surface for a liquid-vapour system ?

With increase in the liquid flow rate at a fixed gas velocity in a randomly packed counter current gas-liquid absorption column, the gas pressure drop_____?

Which of the following solutions will follow Raoult?s law most closely ?

Which is not concerned directly with mass transfer ?

Which of the following gas-liquid contacting devices incurs the least pressure drop for a particular duty ?

With increase in temperature, the leaching rate increases because of the _______?

Which of the following employs an accessory known as ?drift eliminator? ?

With increase in the concentration of the adsorbate, the integral heat of adsorption______?

With increase in absolute humidity, the dew point of an unsaturated mixture of air and water vapor (at constant pressure and temperature) ?

Which of the following is not fixed by the process requirements, in the design of absorbers ?

Which of the following is the most suitable for extraction in a system having very low density difference ?

Which of the following remains constant during evaporative cooling process with recirculated water supply ?

With increase in temperature, the solubility of gases in liquids, at fixed pressure______?

Which of the following is directly concerned with Psychrometry ?

Which of the following equipments is not used for liquid dispersion ?

Which of the following can be calculated theoretically using steam table and Dalton?s law of partial pressure; if the relative humidity and dry bulb temperature of moist air is known ?

Which of the following remains constant during sensible cooling process ?

With lapse of time, the overhead composition of light component in case of batch distillation with constant reflux___________?

With increase in temperature, the leaching rate increases due to___________?

With increase in temperature, the mutual solubility of two liquids__________?

Which of the following liquid-vapor contacting devices provides maximum contact surface area for a particular duty ?

Which of the following is an undesirable property in a tower packing ?

Which of the following is not a continuous drier ?

Which of the following is a suitable absorbent for removal of H2S from natural gas ?

With increase in solvent rate, the number of transfer units, NtoG, for a fixed degree of absorption from a fixed amount of gas_________?

Which of the following is not a unit of mass transfer co-efficient ?

Which of the following parameters remains almost constant during adiabatic saturation of unsaturated air ?

Which of the following assumes constant molal vaporisation and overflow ?

Which of the following is used for the concentration of rubber latex ?

Which of the following unit operations makes use of Thiele-Geddes equation ?

With increase in pressure, the relative volatility for a binary system__________?

Which of the following processes is followed by unsaturated air (with dry bulb temperature 12?C and relative humidity 47%) passing through water spray washer (temperature of water being constant at 40?C ?

Which of the following binary systems is an example of a maximum boiling azeotrope ?

Which of the following equipments is not used for gas dispersion ?

Which of the following increases during evaporative cooling process with recirculated water supply ?

With decrease in the throughput (compared with the design capacity) for a bubble cap distillation column, its efficiency______?

Which of the following plays an important role in problems of simultaneous heat and mass transfer ?

Which of the following processes is not an example of adsorption applied to gaseous separations ?

With increase in temperature, the mutual solubility of two liquids_____?

Which of the following is not a batch drier ?

Which of the following quantities need not be fixed before starting the design of a cocurrent absorber ?

Which of the following is considered equivalent to one theoretical stage in Mc-Cabe Thiele?s method ?

Which of the following mixtures does not form an azeotrope at atmospheric pressure ?

Which of the following adsorbent is used in the refining of sugar?

Which is the controlling factor for a drum drier ?

Which of the following adsorbent is used to decolourise yellow glycerine ?

With increase in temperature, the rate of leaching increases, because the_____?

With the lowering of equilibrium pressure, at a given temperature, the amount of adsorbate on the adsorbent ?

With the lowering of equilibrium pressure, at a given temperature, the amount of adsorbate on the adsorbent________?

Which of the following decreases during evaporative cooling process with recirculated water supply ?

Which of the following is an undesirable property for an absorbing solvent ?

Which of these columns incurs the lowest pressure drop ?

With increase in the mass velocity of the gas, the rate of drying during the constant rate period _______, if the conduction and radiation through the solid are negligible ?

Which of the following has the same dimension as mass diffusivity ?

Which of the following parameters remains constant during chemical dehumidification ?

Which of the following is an undesirable characteristic for the solvent used in gas absorption ?