Mechanical Operations
Driving force in case of filtration by a centrifuge is the

Centrifugal pressure exerted by the liquid
Formation of highly porous cake
Speed of the centrifuge
Narrow diameter of the vessel

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Mechanical Operations
Cumulative analysis for determining surface is more precise than differential analysis, because of the

Assumption that all particles in a single fraction are equal in size
None of these
Assumption that all particles in a single fraction are equal in size, is not needed
Fact that screening is more effective

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