Related Questions

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
Flooding in a distillation column is detected by a sharp
A Increase in Murphree plate efficiency
B Decrease in pressure drop
C Decrease in liquid hold up in the coloumn
D Increase in pressure drop
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
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
Cox chart, which is useful in the design of distillation column particularly for petroleum hydrocarbons, is a plot of (where, P = vapor pressure, T = temperature)
A Log P vs . T
B Log P vs. log T
C T vs . P
D P vs . log T
In packed absorption tower, onset of flooding usually occurs at a pressure drop of about __________ mm of water column per metre height of packing.
A 25-50
B 50-75
C 200-250
D 750-1000
Operating velocity in a packed tower is usually __________ the flooding velocity.
A Half
B Twice
C Equal to
D More than
Packed column distillation is limited to the column __________ metres.
A [

A. Height

B. Diameter

B Both A & B
C Neither A nor B
Flooding in a column results due to
A High pressure drop
B Low pressure drop
C Low velocity of the liquid
D High temperature

Next steps