Ponchon Savarit method is based on the use of enthalpy concentration diagram, which contains the bubble point curve (saturated liquid curve), dew point curve (saturated vapour curve) and equilibrium tie lines. As compared to McCabe-Thiele’s method, this method_________________?

Related Mcqs:

1. For a given design of bubble cap, the number of bubble caps to be used per tray is set by the _________________?

   A. Allowable gas velocity through the slots
   B. Plate spacing
   C. Diameter of the column
   D. All A., B. and C.

2. In actual operation of distillation column, the vapour is not distributed uniformly among the bubble caps, primarily because of the_______________?

   A. Liquid gradient on the tray
   B. Lower skirt clearance
   C. Lower static submergence
   D. Small downcomer liquid seal

3. Maximum allowable vapour velocity in a bubble cap tower is determined by the ____________________?

   A. Entrainment considerations
   B. Vapour density
   C. Diameter of the column
   D. None of these

4. Diameter of bubble caps used in high pressure columns is ______________ as compared to that used in identical vacuum columns?

   A. Less
   B. More
   C. Same
   D. Either A. or B.; no generalisation can be made

5. What is the value of ‘q’ for saturated vapor feed to a distillation column? (where q = fraction of the feed stream that is liquid ?

   A. 0
   B. 1
   C. 1

6. What is the slope of the feed line, if the feed to a distillation column is a saturated liquid ?

   A. 0
   B. ∞
   C. > 1
   D. < 1

7. In shell and tube heat exchangers, straight tie rods are used to_________________?

   A. Hold baffle in space
   B. Fix the tubes in position
   C. Account for thermal strain
   D. None of these

8. The absorption factor is defined as (where, S1 = slope of the equilibrium curve, S2 = slope of the operating line) ?

   A. S1/S2
   B. S1.S2
   C. S2/S1
   D. 1/S1.S2

9. In the allocated cap area, bubble caps are generally arranged on equilateral triangular pitch. Number of caps fixed on a plate is with a __________________?

   A. Clearance of 25-75 mm
   B. Cap pitch of 1.3-2 times the cap diameter
   C. Either A. or B.
   D. Neither A. nor B.

10. Normally, the ratio of the total riser area to the tower cross sectional area (for bubble cap towers of diameter more than 3 ft) is around_______________?

    A. 0.4-0.6
    B. 0.35-0.75
    C. 0.1-0.2
    D. 0.55-0.85