Mechanical Operations Which of the following gives the work required for size reduction of coal to -200 mesh in a ball mill most accurately ? Rittinger's law Bond's law None of these Kick's law Rittinger's law Bond's law None of these Kick's law ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations With increase in the capacity of screens, the screen effectiveness Decreases Decreases exponentially Increases Remains unchanged Decreases Decreases exponentially Increases Remains unchanged ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations For efficient grinding, ball mills must be operated With minimum possible small balls At a speed less than the critical speed At a speed equal to the critical speed At a speed more than the critical speed With minimum possible small balls At a speed less than the critical speed At a speed equal to the critical speed At a speed more than the critical speed ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Sedimentation on commercial scale occurs in Cyclones Rotary drum filters Thickeners Classifiers Cyclones Rotary drum filters Thickeners Classifiers ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Balls for ball mills are never made of Forged/cast steel Alloy steel Lead Cast iron Forged/cast steel Alloy steel Lead Cast iron ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Work index is defined as the 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 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 needed to crush one tonne of feed to 200 microns 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 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 needed to crush one tonne of feed to 200 microns ANSWER DOWNLOAD EXAMIANS APP
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