31. The cake resistance increases steadily with the time of filtration in a plate and frame filter employing constant __________ filtration.
32. For crushing of solids, the Rittinger's law states that the work required for crushing is proportional to
33. Xanthates are used in the froth floatation process as a/an
34. Dispersion of a gas through liquid is done by using a
35. Vacuum is applied in __________ zone, in case of a general type continuous rotary drum vacuum filter.
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