Can the efficiency of a plate in the distillation tower be greater than 100% ?

Related Mcqs:

1. Can the efficiency of a plate in the distillation tower be greater than 100% ?

   A. Yes
   B. Normally not; but is possible if infinite number of plates are put
   C. Never
   D. Yes; if the reflux ratio is maximum

2. Pressure drop through plate tower as compared to that through packed tower, for the same duty will be___________________?

   A. Less
   B. More
   C. Equal
   D. Either A. or B.; depends on the packing height

3. A packed tower compared to a plate tower for a particular mass transfer operation__________________?

   A. Incurs smaller pressure drop
   B. Allows installation of cooling coils
   C. Is less costly when built in large sizes/diameters
   D. Is more suitable, if suspended solids are present in fluid streams

4. The reason for preferring packed towers over plate towers in distillation practice is that the packed tower operation gives___________________?

   A. Low pressure drop and high hold up
   B. High pressure drop and low hold up
   C. Low pressure drop and low hold up
   D. High pressure drop and high hold up

5. If the path of liquid across the plate is very long as in case of large diameter tower, Murphree efficiency can be _______________ percent?

   A. 100
   B. > 100
   C. < 100
   D. None of these

6. The efficiency of a plate column will be maximum, when the flow is ideal __________________ the plate?

   A. Across
   B. Above
   C. Both A. & B.
   D. Neither A. nor B.

7. Plate efficiency in a distillation column is reduced due to the ______________ of liquid?

   A. Entrainment
   B. Foaming
   C. Weeping & dumping
   D. All A., B. & C.

8. Plate efficiency in a distillation column is reduced due to the ______________________ of liquid?

   A. Entrainment
   B. Foaming
   C. Weeping & dumping
   D. All A., B. & C.

9. The ratio of Murphree plate efficiency to point efficiency is always > 1 in a _______________ flow model?

   A. Plug
   B. Perfectly mixed
   C. Both A. & B.
   D. Neither A. nor B.

10. If the overall efficiency and Murphree plate efficiency are equal, then both the equilibrium and operating lines are_______________?

    A. Straight
    B. Parallel
    C. Both A. & B.
    D. Neither A. nor B.