Mechanical Operations Tabular bowl centrifuges as compared to disk bowl centrifuges Employ bowl of larger diameter Operate at higher speed Can't be used for separation of fine suspended solids from a liquid Can not be operated under pressure/vacuum Employ bowl of larger diameter Operate at higher speed Can't be used for separation of fine suspended solids from a liquid Can not be operated under pressure/vacuum ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations For spheres, the surface shape factor is given by (where, A = area, V = volume, and D = diameter) None of these π(=A/D²) AD/V π/6(=V/D³) None of these π(=A/D²) AD/V π/6(=V/D³) ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Width and speed of a conveyor belt depends upon the __________ of the material. Lump size Neither A nor B Bulk density Both A & B Lump size Neither A nor B Bulk density Both A & B ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations The specific cake resistance for incompressible sludges is (where ΔP = pressure drop over cake) ∝ √ΔP Independent of ΔP ∝ 1/ ΔP ∝ ΔP ∝ √ΔP Independent of ΔP ∝ 1/ ΔP ∝ ΔP ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Close circuit grinding by a ball mill with air sweeping employs a Classifier Both A & B Neither A nor B Cyclone separator between mill & classifier Classifier Both A & B Neither A nor B Cyclone separator between mill & classifier ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations During agitation of liquids, power consumption during laminar flow is not proportional to the Square of rotational speed Viscosity of the liquid Cube of impeller diameters Density of the liquid Square of rotational speed Viscosity of the liquid Cube of impeller diameters Density of the liquid ANSWER DOWNLOAD EXAMIANS APP
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