Mechanical Operations
Sorting classifiers employing differential settling methods for separation of particles make use of the differences in their

Densities
Particle sizes
None of these
Terminal velocities

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Mechanical Operations
Rod mills employed for grinding

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

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