Related Questions

Kelly and Chris packed several boxes with books. If Chris packed 60 percent of the total number of boxes, what was the ratio of the number of boxes Kelly packed to the number of boxes Chris packed?
A 1 to 6
B 1 to 4
C 2 to 5
D 2 to 3
At the same gas flow rate, the pressure drop in a packed tower being irrigated with liquid __________ that in dry packed tower.
A Is greater than
B Is lower than
C Is same as
D Cannot be predicted as data are insufficient
Commercial packed scrubbers are normally designed for a pressure drop range of __________ mm water coloumn per metre of packed height.
A 4-8
B 17-34
C 52-68
D 88-105
For a fluidised bed reactor, the most suitable/relevant model is a __________ model.
A Tank in series
B Bubbling bed
C Plug flow
D None of these
Pressure drop in packed bed for turbulent flow is given by the __________ equation.
A Kozney-Karman
B Blake-Plummer
C Leva's
D Hagen-Poiseulle's
Pressure drop in a packed bed for laminar flow is given by the __________ equation.
A Kozney-Karman
B Blake-Plummer
C Leva's
D Fanning friction factor
Smaller sized packings are generally dumped to the packed columns, and the large ones of size greater than __________ mm are stacked individually, which provides better control over bed porosity and offers lower gas pressure drop.
A 25
B 50
C 75
D 150
Fluidised bed reactor is characterised by
A Uniformity of temperature
B Comparatively smaller equipment
C Very small pressure drop
D Absence of continuous catalyst regeneration facility
In a fluidised bed reactor
A Temperature gradients are very high
B Temperature is more or less uniform
C Hot spots are formed
D Segregation of the solids occurs
Slugging occurs in a fluidised bed, if the bed is
A Narrow
B Deep
C Both A & B
D Neither A nor B

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