Related Questions

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 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 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
Two-fifths of the caps in a box are red, one-fourth are blue and the rest are green. What is the ratio of the green caps to the blue caps?
A 5 : 8
B 5 : 7
C 7 : 8
D 8 : 7
Hole diameter of the seive trays in the distillation column ranges from __________ mm.
A 1 to 3
B 4 to 8
C 3 to 12.5
D 12.5 to 18.5
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
In distillation columns, the number of bubble caps per tray primarily depends upon the
A Allowable liquid velocity
B Allowable gas velocity
C Allowable gas and liquid velocities
D Feed composition
Larger depth of liquid on the trays of a distillation column
A Leads to high tray efficiency
B Results in higher pressure drop per tray
C Both A & B
D Neither A nor B
In a shell and tube heat exchanger having square pitch, the shell side equivalent diameter is given by (where, P = pitch, d = outside diameter of the tube)
A $$\frac{{4\left( {{{\text{p}}^2} - \pi {{\text{d}}^2}/4} \right)}}{{\pi {\text{d}}}}$$
B $$\frac{{{{\text{p}}^2} - \pi {{\text{d}}^2}/4}}{{\pi {\text{d}}}}$$
C $$\frac{{4{{\text{p}}^2}}}{{\pi {\text{d}}}}$$
D $$\frac{{\pi {\text{d}}}}{{4{{\text{p}}^2}}}$$

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