Mechanical Operations
Paddle agitator

Produces axial flow
Is suitable for mixing low viscosity liquids
Moves at very high speed
None of these

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Mechanical Operations
Rod mills employed for grinding

Employ steel rods of 2-12 cms diameter extending over full length of the mill
Employ a steel shell having L/D ratio of 1.5 to 3.0
Is useful for handling sticky materials
All of these

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Mechanical Operations
A filter press is

A batch filter
Not suitable for wide range of materials under varying operating conditions of cake thickness and pressure
Having prohibitively high maintenance cost
Not suitable, if the liquid is the main product

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