Mechanical Operations Separation of solid suspended in liquid into a supernatant clear liquid and a denser slurry employs a process termed as the Clarification Coagulation Sedimentation Flocculation Clarification Coagulation Sedimentation Flocculation ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations In closed circuit grinding as compared to open circuit grinding, the Production rate at a given limiting size is lower Specific surface of product is more Operation is economical Product has lesser size uniformity Production rate at a given limiting size is lower Specific surface of product is more Operation is economical Product has lesser size uniformity ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Highly viscous liquids & pastes are agitated by Turbine agitators None of these Propellers Multiple blade paddles Turbine agitators None of these Propellers Multiple blade paddles ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Work index is defined as the Gross energy (kWh/ton of feed) needed to reduce very large feed to such a size that 80% of the product passes through a 100 micron screen Energy (kWh/ton of feed) needed to crush small feed to such a size that 80% of the product passes a 200 mesh screen Energy needed to crush one ton of feed to 100 microns Energy needed to crush one tonne of feed to 200 microns Gross energy (kWh/ton of feed) needed to reduce very large feed to such a size that 80% of the product passes through a 100 micron screen Energy (kWh/ton of feed) needed to crush small feed to such a size that 80% of the product passes a 200 mesh screen Energy needed to crush one ton of feed to 100 microns Energy needed to crush one tonne of feed to 200 microns ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations For a turbine agitated and baffled tank, operating at low Reynold's number (based on impeller diameter), the power number (Np) varies with NRe as Np ∝ NRe Np ∝ √NRe Np → constant Np ∝ 1/NRe Np ∝ NRe Np ∝ √NRe Np → constant Np ∝ 1/NRe ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations For benefication of iron ore, the most commonly used method is Flocculation None of these Froth floatation Jigging & tabling Flocculation None of these Froth floatation Jigging & tabling ANSWER DOWNLOAD EXAMIANS APP
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