Mechanical Operations
Addition of filter aid to the slurry before filtration is done to ...... of the cake.

Decrease the compressibility co-efficient
Decrease the porosity
Increase the porosity
Increase the compressibility co-efficient

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Mechanical Operations
A pebble mill

Employs flints or ceramic pebbles as the grinding medium
Is a tube mill lined with ceramic or other non-metallic liner
Both B and C
Is a ball mill

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