Dimension of mass diffusivity is the same as that of_____________________?

Related Mcqs:

1. 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...

2. If mass diffusivity in a mixture is equal to the thermal diffusivity, then the Lewis number is____________________

   A. 0 B. 1 C. 1...

3. Which of the following has the same dimension as mass diffusivity ?

   A. Momentum flux B. Kinematic viscosity C. Thermal diffusivity D. Both B. and C....

4. 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...

5. 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...

6. The diffusivity, DAB (for component A diffusing in B) is equal to the diffusivity DBA (for component B diffusing in A) for a binary mixture of________________?

   A. Newtonian liquids B. Non-Newtonian liquids C. Ideal gases D. Real gases...

7. The dimension of diffusivity is same as that of the__________________?

   The dimension of diffusivity is same as that of the A. Density B. Molal concentration C. Kinematic viscosity D. Velocity head...

8. A solid is being dried in the linear drying rate regime from moisture content Xo to XF. The drying rate is zero at X = 0 and the critical moisture content is the same as the initial moisture Xo. The drying time for M = (Ls/ARc) is (where, L = total mass of dry solid, A = total surface area for drying Rc = Constant maximum drying rate per unit area X = moisture content (in mass of water/mass of dry solids)) ?

   A. M(Xo – XF) B. M(Xo/XF) C. M ln(Xo/XF) D. MXo ln(Xo/XF)...

9. A solid is being dried in the linear drying rate regime from moisture content Xo to XF. The drying rate is zero at X = 0 and the critical moisture content is the same as the initial moisture Xo. The drying time for M = (Ls/ARc) is (where, L = total mass of dry solid, A = total surface area for drying Rc = Constant maximum drying rate per unit area X = moisture content (in mass of water/mass of dry solids))_____________?

   A. M(Xo – XF) B. M(Xo/XF) C. M ln(Xo/XF) D. MXo ln(Xo/XF)...

10. The mass transfer co-efficient for a solid sphere of radius ‘a’ dissolving in a large volume of quiescent liquid, in which „D’ is the diffusivity of solute, is _____________________?

    A. D/a B. D/2a C. Proportional to √D D. Dependent on the Reynolds number...