Related Questions

Pressure drop in a fluidised bed reactor is __________ that in a similar packed bed reactor.
A Less than
B More than
C Same as
D None of these
Slugging occurs in a fluidised bed, if the bed is
A Narrow
B Deep
C Both A & B
D Neither A nor B
The uniformity of a gas fluidised bed depends upon the __________ of the solid particles.
A Size
B Surface properties
C Both A and B
D Neither A nor B
For liquid flow through a packed bed, the superficial velocity as compared to average velocity through the channel in the bed is
A More
B Less
C Equal
D Independent of porosity
With decrease in particle size to be fluidised by a particular fluid, the operating range of fluidisation velocity
A Widens
B Squeezes
C Does not change
D Unpredictable from the data
If V, U and Vr represent the absolute velocity of fluid, velocity of blade, and relative velocity of fluid, and suffix ‘I’ and ‘o’ stand for entry and exit conditions, then in a rotary machine whose degree of reaction is unity
A Vi = Vo
B Vt > Vo
C U
D V = Uo
Which of the following is used as a catalyst in fluidised bed catalytic cracking?
A Silica-magnesia
B Silica-alumina
C Bentonite clays
D All of the above
Which of the following is not applicable to fluidised bed combustion of coal?
A It can not burn low grade coal
B It achieves higher fuel combustion efficiency
C Less heat transfer surface area is required in boilers
D None of these
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
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

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