A. D
B. D2
C. D0.5
D. 1/D
Related Mcqs:
- 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 - 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 - The mass diffusivity, the thermal diffusivity and the eddy momentum diffusivity are same for, NPr = NSc = _________________?
A. 1
B. 0.5
C. 10
D. 0 - Penetration theory relates the average mass transfer co-efficient (K) with diffusivity D. as____________________?
A. K ∝D
B. K ∝√D
C. K ∝D1.5
D. K ∝D2 - 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 - Mass transfer co-efficient is directly proportional to DAB according to the _____________ theory?
A. Film
B. Penetration
C. Surface-renewal
D. None of these - Mass transfer co-efficient is directly proportional to DAB according to the __________ theory?
A. Film
B. Penetration
C. Surface-renewal
D. None of these - 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 - 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 - 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
