Mechanical Operations
Vacuum filter is most suitable for the

Liquids of very high viscosity
None of these
Liquids having high vapour pressure
Removal of fines from liquid

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Mechanical Operations
Filter aids like asbestos, kieselguhr, diatomaceous earth etc. are used to increase the porosity of the final filter cake & reducing the cake resistance during filtration. Filter aid is

Precoated on the filter medium prior to filtration
Added to the feed slurry
Separated from the cake by dissolving solids or by burning it off
All of these

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