Related Questions

In the design of a paddle agitator, the ratio (paddle dia/tank dia) is normally taken as
A 0.1
B 0.8
C 0.25
D 0.5
Speed of industrial paddle agitator ranges from __________ rpm.
A 1 to 5
B 20 to 100
C 500 to 750
D 1000 to 2000
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
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
The raio, (properller agitator dia/tank dia) is normally taken as
A 0.15-030
B 0.5-0.65
C 0.75-0.85
D 0.60-0.90
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

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