Mass Transfer Archives - Page 91 of 93 -

The equation, NA = (DAB . Pt /RTZ) (y1 – y2) is for _______________________?

The equation, NA = (DAB . Pt /RTZ) (y1 – y2) is for _______________________?

A. Steady state equimolar counter diffusion
B. Fick’s first law of diffusion
C. Steady state diffusion for stagnant case
D. Liquid M.T.C. by penetration theory

The equation, NA = (DAB . Pt /RTZ) (y1 – y2) is for _______________________? Read More »

Mass Transfer

Penetration theory states that the mass transfer co-coefficient is equal to (where, De is diffusivity and ‘t’ is time) ?

Mass Transfer / admin

Penetration theory states that the mass transfer co-coefficient is equal to (where, De is diffusivity and ‘t’ is time) ?

A. (De.t)1/2
B. (De/t)1/2
C. (4De/πt)1/2
D. (4De/t)

Penetration theory states that the mass transfer co-coefficient is equal to (where, De is diffusivity and ‘t’ is time) ? Read More »

Mass Transfer

The relative volatility of a binary mixture at the Azeotropic composition is _______________________?

Mass Transfer / admin

The relative volatility of a binary mixture at the Azeotropic composition is _______________________?

A. 1
B. > 1
C. 0
D. ∞

The relative volatility of a binary mixture at the Azeotropic composition is _______________________? Read More »

Mass Transfer

For absorbing a sparingly soluble gas in a liquid, the_____________________?

Mass Transfer / admin

For absorbing a sparingly soluble gas in a liquid, the_____________________?

A. Gas side co-efficient should be increased
B. Liquid side coefficient should be increased
C. Gas side co-efficient should be decreased
D. Liquid side co-efficient should be decreased

For absorbing a sparingly soluble gas in a liquid, the_____________________? Read More »

Mass Transfer

Moisture content of a substance when at equilibrium with a given partial pressure of the vapour is called the _______________ moisture?

Mass Transfer / admin

Moisture content of a substance when at equilibrium with a given partial pressure of the vapour is called the _______________ moisture?

A. Free
B. Unbound
C. Equilibrium
D. Bound

Moisture content of a substance when at equilibrium with a given partial pressure of the vapour is called the _______________ moisture? Read More »

Mass Transfer

For the flow of gases through a capillary, with increase in temperature, the permeability __________________ as per Knudsen law?

Mass Transfer / admin

For the flow of gases through a capillary, with increase in temperature, the permeability __________________ as per Knudsen law?

A. Increases
B. Decreases
C. Remain same
D. Either A. or B.; depends on the gas

For the flow of gases through a capillary, with increase in temperature, the permeability __________________ as per Knudsen law? Read More »

Mass Transfer

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___________________?

Mass Transfer / admin

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___________________?

A. Decreases
B. Remains unchanged
C. Increases
D. Decreases exponentially

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___________________? Read More »

Mass Transfer

A natural draft cooling tower is filled with wooden grids, which covers about _________________ percent of the tower height?

Mass Transfer / admin

A natural draft cooling tower is filled with wooden grids, which covers about _________________ percent of the tower height?

A. 10-15
B. 30-40
C. 70-80
D. 90-100

A natural draft cooling tower is filled with wooden grids, which covers about _________________ percent of the tower height? Read More »

Mass Transfer

The Knudsen diffusivity is proportional to (where, T = absolute temperature) ______________________?

Mass Transfer / admin

The Knudsen diffusivity is proportional to (where, T = absolute temperature) ______________________?

A. √T
B. T2
C. T
D. T4

The Knudsen diffusivity is proportional to (where, T = absolute temperature) ______________________? Read More »

Mass Transfer

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

Mass Transfer / admin

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

A. Recovery of valuable solvent vapors from dilute mixture with air and other gases
B. Dehumidification of air and gas
C. Removal of objectionable odour and impurities from industrial gases
D. Decolouration of yellow glycerine

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

Mass Transfer