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

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. 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. Wetted wall tower experiment determines the__________________?

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

4. 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

5. Laboratory determination of the diffusivity of vapor is done by ______________ method?

   A. Wetted wall column
   B. Gilliland’s
   C. Winkelmann’s
   D. Wike’s

6. Laboratory determination of the diffusivity of vapor is done by __________________ method?

   A. Wetted wall column
   B. Gilliland’s
   C. Winkelmann’s
   D. Wike’s

7. According to the Fenske equation, what will be the minimum number of plates required in a distillation column to separate an equimolar binary mixture of components A and B into an overhead fraction containing 99 mol% A and a bottom fraction containing 98 mol% B ? Assume that relative volatility (αAB = 2) does not change appreciably in the column ?

   A. 5
   B. 9
   C. 12
   D. 28

8. Packed column distillation is limited to the column _____________ metres?

   A. Height < 6
   B. Diameter < 0.6
   C. Both A. & B.
   D. Neither A. nor B.

9. An aqueous solution of methanol is to be distilled in a tray column. High pressure steam is available as a source of heat. For a given reflux ratio and overhead composition, two options are being explored; (i) a reboiler is used and (ii) no reboiler is used but steam is fed directly to the bottom of the column. As compared to option (i), in option (ii) ____________________?

   A. Less number of trays are required
   B. Composition of the residue remains unchanged
   C. More number of trays are required but the residue composition remains unchanged
   D. More number of trays are required and the residue composition is more dilute in methanol

10. A distillation column with N plates is being operated under normal conditions. At some point of time, the operation is shifted to total reflux condition (i.e., no product and residue are being withdrawn and feed to the column is stopped). At the new steady state ?

    A. Composition of vapors and that of liquid do not vary throughout the column
    B. Reboiler load and condenser load are minimum
    C. The top and bottom compositions are unchanged with and without total reflux
    D. The top and bottom compositions correspond to the maximum enrichment available