Mechanical Operations
In continuous filtration (at a constant pressure drop), filtrate flow rate varies inversely as the

Square root of the velocity
Washing time only
Filtration time only
Square of the viscosity

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Mechanical Operations
Rod mills employed for grinding

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

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