Mechanical Operations
Separation of a suspension or slurry into a supernatant clear liquid (free from particles) and a thick sludge containing a high concentration of solid is called

Clarification
Decantation
Sedimentation
Classification

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Mechanical Operations
Arrange the following size reduction equipment in the decreasing order of the average particle size produced by each of them.

Jaw crusher, Ball mill, Fluid energy mill
Fluid energy mill, Jaw crusher, Ball mill
Ball mill, Jaw crusher, Fluid energy mill
Fluid energy mill, Ball mill, Jaw crusher

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