Related Questions

Crystal size in a continuous crystalliser depends upon the
A Rate of heat transfer
B Degree of turbulence
C Degree of supersaturation
D All of the above
In most of the vacuum crystalliser, vacuum is generally produced by means of a
A Suction pump
B Compressed air jet
C Steam jet ejector with a barometric condenser
D None of these
Swenson-Walker crystalliser is a __________ unit
A Continuous
B Batch
C Semi-batch
D Cooling (adiabatic)-cum-evaporation
Scale up of agitator design requires
A Geometrical similarity only
B Dynamic similarity only
C Both geometrical and dynamic similarity
D All of the above
A propeller agitator
A Produces mainly axial flow
B Is used for mixing high viscosity pastes
C Runs at very slow speed (2 rpm)
D All of the above
Helical screw agitator is used for
A Mixing highly viscous pastes
B Blending immiscible liquids
C Mixing liquids at very high temperature (> 250 °C)
D None of these
Laminar flow region is said to exist during agitation of a liquid in an agitator, when the value of Reynolds number is
A >10
B >100
Paddle agitator
A Is suitable for mixing low viscosity liquids
B Produces axial flow
C Moves at very high speed
D None of these
In the agitators, the power required will be changed with the increase of diameter of agitator (D) as
A D2
B D5
C D
D D9
Speed of industrial paddle agitator ranges from __________ rpm.
A 1 to 5
B 20 to 100
C 500 to 750
D 1000 to 2000

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