Related Questions

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
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
A high vapour velocity is required for high plate efficiency in a seive plate coloumn. The satisfactory value of operating vapor velocity for design purpose in seive plate column is about __________ percent of the flooding velocity.
A 45
B 60
C 80
D 95
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
With decrease in the throughput (compared with the design capacity) for a bubble cap distillation column, its efficiency
A Increases
B Decreases
C Remains same
D May increase or decrease ; depends on individual design
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
A compressor that takes suction at a pressure below atmospheric and discharge against atmospheric pressure is called a __________ pump.
A Sump
B Volute
C Vacuum
D Submerged
The coastline formed by the submergence of mountain ridges running parallel to the coast is known as ________
A Dalmation coast
B Ria coast
C Fiord coast
D Haff coast
Which of the following are known as coastlines of submergence?
A Ria coasts
B Uplifted lowland
C Emergent upland
D Concordant coasts

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