Mechanical Operations
Weber number is significant and is concerned with the

Liquid-liquid mixing
Solid-liquid mixing
Dispersion of liquid in liquid
Suspension of solid in 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
Separated from the cake by dissolving solids or by burning it off
All of these
Added to the feed slurry

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Mechanical Operations
Pick out the wrong statement pertaining to the turbine agitator.

Recommended peripheral speed for the turbine agitator is 200-250 metres/minute
Turbine agitator should be located at a height not less than one agitator diameter length from the bottom. If the depth of liquid in the tank is more than twice the agitator diameter, two agitators sh
Pitched blade turbine agitator gives only radial flow with complete absence of the axial flow
Generally, the diameter of the agitator is kept between l/3rd to l/6th of the tank diameter while the blade length is l/4th of agitator diameter (with central disc, it is l/8th of the agitator diamete

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