Mechanical Operations Colloidal mills are used for __________ grinding. Fine Ultrafine Coarse Intermediate Fine Ultrafine Coarse Intermediate ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Number of particles in a crushed solid sample is given by (where, m = mass of particles in a sample, Vp = volume of one particle, ρ= density of particles) M/ρ . Vp M . Vp/ρ M . ρ/Vp Vp/m . ρ M/ρ . Vp M . Vp/ρ M . ρ/Vp Vp/m . ρ ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations For spheres, the surface shape factor is given by (where, A = area, V = volume, and D = diameter) π/6(=V/D³) π(=A/D²) AD/V None of these π/6(=V/D³) π(=A/D²) AD/V None of these ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Higher is the mesh number, smaller will be the aperture size of the screen. It means that the aperture size of a 200 mesh screen will be smaller than that of 20 mesh screen. This is valid for All of these German standard screens (DIN 1171) etc British standard screens American standard screens (ASTM and Tyler standard screens) All of these German standard screens (DIN 1171) etc British standard screens American standard screens (ASTM and Tyler standard screens) ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations In case of a revolving mill, wet grinding compared to dry grinding Requires more energy Has less capacity Complicates handling & classification of the product None of these Requires more energy Has less capacity Complicates handling & classification of the product None of these ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Pick out the wrong statement pertaining to the roll crushers. Reduction ratio and differential roll speed affect production rate & energy consumed per unit of surface produced Both the rolls run necessarily at the same speed For hard material's crushing, the reduction ratio should not exceed 4 Maximum feed size determines the required roll diameter Reduction ratio and differential roll speed affect production rate & energy consumed per unit of surface produced Both the rolls run necessarily at the same speed For hard material's crushing, the reduction ratio should not exceed 4 Maximum feed size determines the required roll diameter ANSWER DOWNLOAD EXAMIANS APP
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