Calculation of mass transfer co-efficient is mostly/normally done using ______________ theory?

Related Mcqs:

1. 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...

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

   A. Calculated B. Unknown C. Known D. Not required...

3. 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...

4. 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)...

5. 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...

6. The Reynolds number of the liquid was increased 100 fold for a laminar falling film used for gas-liquid contacting. Assuming penetrating theory is applicable, the fold increase in the mass transfer co-efficient (Kc) for the same system is_______________________?

   A. 100 B. 10 C. 5 D. 1...

7. Mass transfer co-efficient is directly proportional to DAB according to the _____________ theory?

   A. Film B. Penetration C. Surface-renewal D. None of these...

8. Mass transfer co-efficient is directly proportional to DAB 0.5, according to ________________ theory ?

   A. Penetration B. Surface renewal C. Film D. None of these...

9. Mass transfer co-efficient varies as DAB 0.5, according to the _______________ theory?

   A. Film B. Surface renewal C. Penetration D. None of these...

10. Mass transfer co-efficient (K) and diffusivity D. are related according to film theory as______________________?

    A. K ∝ D B. K ∝√D C. K ∝ D1.5 D. K ∝ D2...