For experimental determination of mass transfer co-efficient by wetted wall tower, the mass transfer area is___________________?

Related Mcqs:

1. Experimental determination of ________________ is done by wetted wall column method?

   A. Diffusion co-efficient
   B. Mass transfer co-efficient
   C. NTU
   D. None of these

2. Experimental determination of _______________ is done by wetted wall column method?

   A. Diffusion co-efficient
   B. Mass transfer co-efficient
   C. NTU
   D. None of these

3. For the gas absorption, the height of a transfer unit, based on the gas phase is given by (G: superficial molar gas velocity, L: superficial molar liquid velocity, FG: mass transfer co-efficient, moles/m2, a: interfacial area per unit volume of tower) ?

   A. G/(FG . a)
   B. FG/(G . a)
   C. (G . a)/FG
   D. L/(FG . G)

4. According to the film theory of mass transfer, the mass transfer co-efficient is proportional to (where, D = molecular diffusivity) ?

   A. D
   B. D2
   C. D0.5
   D. 1/D

5. Wetted wall tower experiment determines the__________________?

   A. Molal diffusivity
   B. Volumetric co-efficient
   C. Mass transfer co-efficient
   D. None of these

6. The wetted wall tower is used to determine_________________________?

   A. Individual mass transfer co-efficient (M.T.C.) in gaseous system
   B. M.T.C. of individual components in a liquid-liquid system
   C. M.T.C. of liquid in liquid-gas system
   D. The overall M.T.C. of the system

7. A packed tower compared to a plate tower for a particular mass transfer operation__________________?

   A. Incurs smaller pressure drop
   B. Allows installation of cooling coils
   C. Is less costly when built in large sizes/diameters
   D. Is more suitable, if suspended solids are present in fluid streams

8. H2S is being absorbed in a gas absorber unit. The height of the transfer unit based on the overall mass transfer coefficient on the gas side is 0.4 m. The equilibrium data is given by, y = 1.5 x. The bulk concentration of H2S has to be reduced from 0.05 to 0.001 mole fraction in the gas side. The height of the tower (in meters) corresponding to an operating line given by, y = 5x + 0.001 is ______________________?

   A. 2.0
   B. 1.56
   C. 1.0
   D. 0.56

9. Mass transfer co-efficient ‘K’ according to penetration theory varies with mass diffusivity as____________________?

   A. D0.5
   B. D
   C. 1/D
   D. D1.5

10. JD factor for mass transfer is a function of Reynolds number. Mass transfer by molecular diffusion from a single drop to surrounding still air is given by___________________?

    A. Nsh = 2
    B. Nst = 2
    C. Nsc = 2
    D. None of these