Related Questions

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 of the above
Bubble cap tray is the most commonly used tray in large distillation column, because
A Of its flexibility and nearly constant efficiency under varying conditions of operation
B It incurs less pressure drop as compared to any other try designed for the same duty
C It eliminates the foaming and entrain-ment tendency during operation
D None of these
A minimum clearance of about __________ mm is maintained between the distillation column wall and the bubble cap.
A 19
B 38
C 76
D 95
In actual operation of a bubble cap distillation tower, the __________ at the bottom of the tower is more than that at the top of the tower.
A Molal flow rate of vapour
B Vapour molecular weight
C Pressure and temperature
D All of the above
Bubble cap plate column is
A A finite stage contactor
B Used only for distillation, not for absorption
C A differential stage contactor
D A continuous contactor
Typical static submergence for bubble cap plate column operating at atmospheric pressure may be around
A 2.5"
B 0.5"
C 5"
D 50% of the plate spacing
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
In a distillation column, minimum clearance to be maintained betweeen 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
The load carrying capacity of a helically reinforced column as compared to that of a tied column is about
A 5% less
B 10% less
C 5% more
D 10% more

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