The Schmidt number which is defined as, μ/ρ D, is the ratio of the_____________________?

Related Mcqs:

1. At 750°K and 1 atm, the approximate value of Schmidt number for air is_________________?

   A. 0.01
   B. 0.1
   C. 1
   D. 10

2. In physical terms, Schmidt number means _________________?

   A. Thermal diffusivity/mass diffusivity
   B. Thermal diffusivity/momentum diffusivity
   C. Momentum diffusivity/mass diffusivity
   D. Mass diffusivity/thermal diffusivity

3. Schmidt number and Lewis number for pure air at atmospheric conditions are respectively__________________?

   A. < 1 and ≈ 1
   B. 1 and 0
   C. > 1 and ≈ 1
   D. 0 and ≈ 1

4. Schmidt number is given by ___________________?

   A. μ/ρDAB
   B. Re × Pe
   C. Sh × Pe
   D. Re/Pe

5. 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

6. Advantage of continuous drying over batch drying is that the_____________________?

   A. Drying cost per unit weight of dried product is less
   B. Product with more uniform moisture content is produced
   C. Equipment size required is smaller
   D. All A , B. & C.

7. Raoult’s law is applicable to the_____________________?

   A. Ideal solutions
   B. Real solutions
   C. Mixture of water and alcohol
   D. Non-ideal gases

8. Channelling in a packed tower results from the_____________________?

   A. High pressure drop
   B. Maldistribution of liquid
   C. Non-uniformity of packing
   D. Both B. and C.

9. Gaseous diffusion co-efficient increases with increase in the_____________________?

   A. Pressure
   B. Temperature
   C. Both A. & B.
   D. Neither A. nor B.

10. If a two phase system is in physical equilibrium; then it means that, the_____________________?

    A. Escaping tendency of each component from the liquid phase to the vapor phase is exactly
    equal to that from vapor phase to liquid phase
    B. Temperature of the liquid phase is equal to that of the vapor phase
    C. Total pressure throughout the liquid phase is equal to that throughout the vapor phase
    D. All A., B. and C.