Mechanical Operations Ultrafine grinders operate principally by Slow compression Cutting action Impact Attrition Slow compression Cutting action Impact Attrition ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations During agitation of liquids, the Froude number is independent for the curves between power number and Reynolds number in baffled system Power number becomes independent of impellers Reynolds number at high Reynolds number, but is dependent on the geometry of the impeller All of these Froude number is used to account for the effect of surface (e.g., the centre vortex) on the power number Froude number is independent for the curves between power number and Reynolds number in baffled system Power number becomes independent of impellers Reynolds number at high Reynolds number, but is dependent on the geometry of the impeller All of these Froude number is used to account for the effect of surface (e.g., the centre vortex) on the power number ANSWER DOWNLOAD EXAMIANS APP
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 All of these Separated from the cake by dissolving solids or by burning it off Precoated on the filter medium prior to filtration Added to the feed slurry All of these Separated from the cake by dissolving solids or by burning it off Precoated on the filter medium prior to filtration Added to the feed slurry ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations According to Bond crushing law, the work required to form particle of size 'D' from very large feed is (where (S/V)p and (S/V)f are surface to volume ratio of the product and feed respectively). (S/V)p (S/V)²p (S/V)f √(S/V)p (S/V)p (S/V)²p (S/V)f √(S/V)p ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Angle of nip of the crushing rolls does not depend upon the Speed of the rolls Feed size Product size Diameter of the rolls Speed of the rolls Feed size Product size Diameter of the rolls ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS