Mechanical Operations For efficient grinding, ball mills must be operated At a speed more than the critical speed At a speed less than the critical speed At a speed equal to the critical speed With minimum possible small balls At a speed more than the critical speed At a speed less than the critical speed At a speed equal to the critical speed With minimum possible small balls ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations In a size reduction crushing operation, feed size is 100 to 300 mm. while the product size is 10 to 50 mm. This is a case of the __________ crushing. Secondary Fine Ultrafine Primary Secondary Fine Ultrafine Primary ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Driving force in case of filtration by a centrifuge is the Centrifugal pressure exerted by the liquid Speed of the centrifuge Formation of highly porous cake Narrow diameter of the vessel Centrifugal pressure exerted by the liquid Speed of the centrifuge Formation of highly porous cake Narrow diameter of the vessel ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations There is practically no alternative/competitor to __________ in the beneficiation treatment of sulphide ores. Froth floatation Classification Jigging Tabling Froth floatation Classification Jigging Tabling ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Tabular bowl centrifuges as compared to disk bowl centrifuges Can not be operated under pressure/vacuum Operate at higher speed Employ bowl of larger diameter Can't be used for separation of fine suspended solids from a liquid Can not be operated under pressure/vacuum Operate at higher speed Employ bowl of larger diameter Can't be used for separation of fine suspended solids from a liquid ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Fibrous material is broken by a Rollcrusher Squirrel-cage disintegrator Ball mill Tube mill Rollcrusher Squirrel-cage disintegrator Ball mill Tube mill ANSWER DOWNLOAD EXAMIANS APP
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