Related Questions

In an absorption coloumn, the flooding velocity for random packing is __________ that for stacked/regular packing.
A Greater than
B Smaller than
C Equal to
D Either A, or B ; depends on the type of packing
Vapor velocity in a distillation column for non-foaming mixture is in the range of __________ times the flooding velocity.
A 0.1 to 0.3
B 0.6 to 0.7
C 0.85 to 0.95
D 1.5 to 2
A vapor whose partial pressure is less than its equilibrium vapor pressure is called a __________ vapor.
A Saturated
B Supersaturated
C Superheated
D None of these
A vapor whose partial pressure is less than its equilibrium vapor pressure is called the __________ vapor.
A Saturated
B Superheated
C Unsaturated
D Dry gaseous
Operating velocity in a packed tower is usually __________ the flooding velocity.
A Half
B Twice
C Equal to
D More than
When a high liquid hold up is required in a reactor for gas liquid reaction, use __________ coloumn.
A Packed
B Spray
C Tray
D Bubble
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
Pressure difference between two points in vessels, pipelines or in two different pipelines can be measured by a differential manometer. The pressure difference measured as the mm of water coloumn in case of mercury-water, differential manometer is equal to (where, H = difference in height of mercury column in mm).
A H
B 12.6 H
C 13.6 H
D 14.6 H
Flooding in a vapor-liquid contacting equipment occurs in a tray, when the pressure drop through a tray is __________ the liquid head available in the downcomer.
A Less than
B More than
C Same as
D Very much less
What is the slope of the operating line in the rectifying section of a distillation coloumn?
A 0
B ∞
C > 1

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