Mechanical Operations
Which of the following can be most effectively used for clarification of lube oil and printing ink?

Sharpies supercentrifuge
Sparkler filter
Disc-bowl centrifuge
Precoat filter

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

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

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