Mechanical Operations For spheres, volume shape factor is given by π/6(=V/D³) 2π(=2A/D²) π(=A/D²) AD/V π/6(=V/D³) 2π(=2A/D²) π(=A/D²) AD/V ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations The sphericity of a cylinder of 1 mm diameter and length 3 mm is 0.78 0.6 0.5 0.9 0.78 0.6 0.5 0.9 ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations If dp is the equivalent diameter of a non-spherical particle, Vp its volume and sp its surface area, then its sphericity is Φs is defined by Φs = Vp/dp sp Φs = 6 Vp/dp sp Φs = 6 dp Sp/Vp Φs = dp Sp/Vp Φs = Vp/dp sp Φs = 6 Vp/dp sp Φs = 6 dp Sp/Vp Φs = dp Sp/Vp ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Size reduction of asbestos and mica is done by Hammer mills Rod mills Gyratory crushers Crushing rolls Hammer mills Rod mills Gyratory crushers Crushing rolls ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations In case of a revolving mill, wet grinding compared to dry grinding 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 Requires more energy ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations At low Reynold's number, the power (P) required for agitating a fluid in a stirred tank becomes independent of inertial forces. In this limit, indicate which of the following relations is satisfied: Po = ρ/ρN3 D5 : Power number Re = ρ N D2/μ: Reynold's number N is the impeller rotational speed, and D is the impeller diameter. Po ∝ Re-1.0 Po ∝ Re0.0 Po ∝ Re0.5 Po ∝ Re1.0 Po ∝ Re-1.0 Po ∝ Re0.0 Po ∝ Re0.5 Po ∝ Re1.0 ANSWER DOWNLOAD EXAMIANS APP
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