Mechanical Operations For Indian standard (IS) screens, the mesh number is equal to its aperture size expressed to the nearest deca-micron (0.01 mm). Aperture width of IS screen of mesh number 50 will be approximately __________ microns. 5000 5 500 50 5000 5 500 50 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 Added to the feed slurry Separated from the cake by dissolving solids or by burning it off Precoated on the filter medium prior to filtration All of these Added to the feed slurry Separated from the cake by dissolving solids or by burning it off Precoated on the filter medium prior to filtration All of these ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Toothed roll crushers achieve size reduction by Impact and attrition Tearing (shear) and compression Neither A nor B Both A & B Impact and attrition Tearing (shear) and compression Neither A nor B Both A & B ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations The energy required per unit mass to grind limestone particles of very large size to 100 μm is 12.7 kWh/ton. An estimate (using Bond's law) of the energy to grind the particles from a very large size to 50 μrn is 9.0 kWh/ton 6.35 kWh/ton 25.4 kWh/ton 18 kWh/ton 9.0 kWh/ton 6.35 kWh/ton 25.4 kWh/ton 18 kWh/ton ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations The energy consumed by a ball mill depends on All of these Its speed The density of the material being ground Its ball load All of these Its speed The density of the material being ground Its ball load ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations During the washing of cake Cake resistance decreases Filter medium resistance increases Filter medium resistance decreases All the resistances are constant Cake resistance decreases Filter medium resistance increases Filter medium resistance decreases All the resistances are constant ANSWER DOWNLOAD EXAMIANS APP
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