The ideal size of round bubble caps to be used in industrial distillation column having a diameter of 3-6 metres is ________________ cms?

Related Mcqs:

1. In case of bubble cap distillation column of diameter greater than 1.2 metres, the cap diameter is roughly about _______________ cms?

   A. 10
   B. 20
   C. 30
   D. 35

2. In a distillation column, bubble caps are located on trays with a pitch of ______________ times the outside diameter of the caps?

   A. 1.3 to 2
   B. 1.6 to 2
   C. 2.5
   D. 1.5 to 3

3. Bubble cap diameter used for the distillation column having diameter ranging from 1.5 to 4.5 metres is about ______________ mm?

   A. 10
   B. 50
   C. 100
   D. 200

4. In a distillation column, minimum clearance to be maintained between the overflow weir and the last row of the bubble caps is ______________ cms?

   A. 2.5
   B. 7.5
   C. 15
   D. 20

5. 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

6. 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.

7. In distillation columns, bubble caps are held in place over trays by ________________?

   A. Rivets
   B. A hold down bar
   C. Bolts
   D. Both B. and C.

8. In packed towers provided with pall rings liquid redistributors are positioned at heights of every 6 metres or 5-10 times the column diameter, whichever is less. Maximum size of the pall rings should not exceed _______________________ of the column diameter?

   A. 1/10-1/15th
   B. 1/5-1/10th
   C. 1/20-1/30th
   D. 1/2 to 1/4th

9. 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.

10. The most common standard size of bubble caps used in industrial operation is___________________?

    A. 1″ dia cap with 0.5″ dia riser
    B. 6″ dia cap with 4″ dia riser
    C. 8″ dia cap with 1″ dia riser
    D. 4″ dia cap with 8″ dia riser