Q. A distillation column with N plates is being operated under normal conditions. At some point of time, the operation is shifted to total reflux condition (i.e., no product and residue are being withdrawn and feed to the column is stopped). At the new steady state,

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Q. The absorption factor is defined as (where, L = liquid flow rate, G = gas flow rate and, m = slope of the equilibrium line)

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Q. Smoke is an example of

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Q. Which of the following adsorbant is used in the refinning of sugar ?

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Q. Stacked packing compared to dumped packing

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Q. In McCabe-Thiele method of theoretical plate calculation for a distillation column, the operating lines of stripping and rectifying sections coincide with the diagonal at __________ reflux.

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Q. Dryer widely used in a textile industry is __________ dryer.

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Q. Solvent used in extractive distillation

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Q. Air at a particular humidity is heated in a furnace. The new dew point

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Q. In a packed tower, the value of HETP equals HTUOG, when the equilibrium and the operating lines are (where, HETP = height equivalant to a theoretical plate HTUOG = overall gas phase height of a transfer unit)

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Q. The vapour pressure exerted by the moisture contained in a wet solid depends upon the

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Q. Heat load in a cooling tower

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Q. In case of absorption with exothermic reaction, for fluids having

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Q. Detergent solution is dried to a powder in a

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Q. Which of the following mixtures does not form an azeotrope at atmosheric pressure?

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Q. During bottling of cold drinks (e.g. Pepsi), the main resistance to mass transfer for the absorption of carbon dioxide in water lies in the

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Q. The diffusivity (D) in a binary gas mixture is related to the temperature (T) as

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Q. For which of the following unit operations, Lewis number is of significance ?

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Q. Tray spacing in a distillation column of dia 10-12 ft. used in petroleum refinery may be around __________ inches.

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Q. If a₁ and a₂ are the relative volatilities when the pressure in the distillation column is 1 and 2 atm respectively. Pick out the correct statement.

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