Q. With increase in gas rate, the number of transfer units, NtoG, for a fixed degree of absorption by a fixed amount of solvent

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Q. Schmidt number is given by

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Q. The caking of crystals can be prevented by

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Q. Prandtl number for water at 20°C is about

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Q. Absorption factor method is used to calculate the number of ideal stages, when

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Q. Flights in a rotary dryer are provided to

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Q. If the solubilities of different components (in a liquid-liquid extraction system) increase with rise in temperature, then the temperature above which they dissolve completely is known as the critical solution temperature (CST or consolute temperature). If solubilities increase with decrease in temperature, then CST is the temperature below which they dissolve completely. If a binary system has no critical solution temperature, it implies that

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Q. The rate of mass transfer is not dependent upon the

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Q. On moving the feed line (q-line) from saturated liquid feed (vertical position) to saturated vapor feed (horizontal feed), if the slope of both the operating lines are to be increased, then it will result in

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Q. __________ column is the most suitable for achieving the best performance for mass transfer operations involving liquid with dispersed solids.

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Q. Deairation (removal of O₂) of water is done by

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Q. Make up water is supplied during cooling tower operation to compensate for water losses due to

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Q. Pick out the wrong statement.

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Q. The Kundsen diffusivity is proportional to (where, T = absolute temperature)

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Q. In case of constant underflow extraction operation, the __________ at all solute concentration.

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Q. In an absorption coloumn, the flooding velocity for random packing is __________ that for stacked/regular packing.

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Q. 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.)

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Q. With increase in temperature, the leaching rate increases because of the

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Q. __________ extractor uses centrifugal force for separating the two phases.

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Q. In a binary distillation column, if the feed contains 40 mole % vapour, the q line will have a slope of

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