A. 5
B. 15
C. 7.5
D. 50
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Related Mcqs:
- 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 - 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 - 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 - 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 - 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 - 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. - 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. - 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 - 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. - 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
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