Mechanical Operations During size reduction by a jaw crusher, the energy consumed decreases with the Decreasing size of product at constant size of feed None of these Increasing size of feed at constant reduction ratio Decreasing machine capacity Decreasing size of product at constant size of feed None of these Increasing size of feed at constant reduction ratio Decreasing machine capacity ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations The specific surface of sherical particles is proportional to (where, Dp = diameter of particle). 1/Dp D²p 1/D²p Dp 1/Dp D²p 1/D²p Dp ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations What is the selectivity index, if the grade of tailings & concentrate is the same? 1 ∞ 0.5 1 ∞ 0.5 ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Toothed roll crushers achieve size reduction by Neither A nor B Both A & B Tearing (shear) and compression Impact and attrition Neither A nor B Both A & B Tearing (shear) and compression Impact and attrition ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Mass flow of granular solid (M) through a circular opening of dia, D follows M ∝ D³ M ∝ D² M ∝ √D M ∝ D M ∝ D³ M ∝ D² M ∝ √D M ∝ D ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Electrical energy consumed by a jaw crusher is not a function of the None of these Average product size Average feed size Machine capacity None of these Average product size Average feed size Machine capacity ANSWER DOWNLOAD EXAMIANS APP
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