Related Questions

Which of the following is not accomplished by agitation of liquids in agitators?
A Dispersing gas in liquid
B Blending of immiscible liquids
C Dispersing immiscible liquid in form of emulsion
D Suspending solid particles
Use of baffles in agitators help in minimising the __________ tendency.
A Swirling
B Vortexing
C Both A & B
D Neither A nor B
For turbine agitator, the impeller diameter is about
A 0.3 to 0.5 d
B 0.1 to 0.2 d
C 0.65 to 0.85 d
D 0.95 d
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
Agitator is provided in a crystalliser for
A Avoiding deposition on cooler surfaces
B Formation of nuclei
C Crystal growth
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
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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