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 What is the critical rotation speed in revolutions per second, for a ball mill of 1.2 m diameter charged with 70 mm dia balls? 2.76 0.5 1 0.66 2.76 0.5 1 0.66 ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Fluid medium used in the classification technique of mineral beneficiation is Water Both A & B Neither A nor B Air Water Both A & B Neither A nor B Air ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Sphericity is the ratio of the surface area of a spherical particle having the same volume as the particle to the surface area of the particle. Which of the following has the maximum value of sphericity? Raschig rings Cylinder (L/D = 1) Cube Sphere Raschig rings Cylinder (L/D = 1) Cube Sphere ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Which one is a filter aid? Convas fabric None of these Diatomaceous earth Calcined lime Convas fabric None of these Diatomaceous earth Calcined lime ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Cumulative analysis for determining surface is more precise than differential analysis, because of the Assumption that all particles in a single fraction are equal in size, is not needed None of these Fact that screening is more effective Assumption that all particles in a single fraction are equal in size Assumption that all particles in a single fraction are equal in size, is not needed None of these Fact that screening is more effective Assumption that all particles in a single fraction are equal in size ANSWER DOWNLOAD EXAMIANS APP
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