Mechanical Operations
Which of the following is the most suitable for handling fibrous and dense slurries?

Cone type agitator
Propeller agitator
Turbine agitator
Radial propeller agitator

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Mechanical Operations
Crushing efficiency is the ratio of the

Surface energy created by crushing to the energy absorbed by the solid
Energy fed to the machine to the surface energy created by crushing
Energy absorbed by the solid to that fed to the machine
Energy absorbed by the solid to the surface energy created by crushing

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