26. Size reduction of fibrous materials like wood, asbestos, mica etc. is done by a disintegrator exemplified by the
27. The porosity of a compressible cake is
28. Arrange the following size reduction equipment in the decreasing order of the average particle size produced by each of them.
29. If dp is the equivalent diameter of a non-spherical particle, Vp its volume and sp its surface area, then its sphericity is Φs is defined by
30. __________ is the most commonly used 'filter aid'.
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