Mass Transfer

11._________ extractor is used for the concentration of radioactive nuclear waste.

1. Pulsed column
2. Sieve plate
3. Mixer-settler
4. Bollman

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12._________ extractor uses centrifugal force for separating the two phases.

1. Treybal
2. Scheibel
3. Podbielniak
4. None of these

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13._________ is concerned with the adsorption equilibria.

1. Fick's law
2. Gibb's equation
3. Freundlich equation
4. None of these

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14._________ is the separation technique used for desalination of sea water.

1. Thermal diffusion
2. Reverse osmosis
3. Adsorption
4. Absorption

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15._________ is the temperature at which a gas-vapor mixture becomes saturated, when cooled at constant total pressure out of contact with a liquid.

1. Dew point
2. Bubble point
3. Dry bulb temperature
4. Wet bulb temperature

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16._________ is used as an 'entrainer' for the separation of acetic acid-water mixture by distillation.

1. Furfural
2. Benzol
3. Butyl acetate
4. Hexane

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17._________ number indicates the ratio of the rates of the heat and mass transfer incase of a cooling tower.

1. Sherwood
2. Stanton
3. Lewis
4. Peclet

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18._________ temperature is the steady state temperature attained by a small amount of liquid evaporating into a large quantity of unsaturated gas-vapor mixture.

1. Dry bulb
2. Wet bulb
3. Dew point
4. None of these

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19.(N_Re . N_Sc) is termed in mass transfer operation as the _________ number.

1. Stanton
2. Sherwood
3. Peclet
4. None of these

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20.(NSh/NRe.NSc) is termed in mass transfer operation as the

1. Stanton number
2. Peclet number
3. Thermal diffusivity
4. Momentum diffusivity

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