Mechanical Operations Ball mills and tube mills with flint or porcelain balls are used for size reduction of Non-metallic ores Limestone Rubber Asbestos Non-metallic ores Limestone Rubber Asbestos ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations For efficient grinding, ball mills must be operated With minimum possible small balls At a speed more than the critical speed At a speed equal to the critical speed At a speed less than the critical speed With minimum possible small balls At a speed more than the critical speed At a speed equal to the critical speed At a speed less than the critical speed ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Which of the following terminology is not used for size reduction of materials to fine sizes or powders? Comminution Pulverisation Dispersion Compression Comminution Pulverisation Dispersion Compression ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Pick out the wrong statement pertaining to the roll crushers. For hard material's crushing, the reduction ratio should not exceed 4 Reduction ratio and differential roll speed affect production rate & energy consumed per unit of surface produced Both the rolls run necessarily at the same speed Maximum feed size determines the required roll diameter For hard material's crushing, the reduction ratio should not exceed 4 Reduction ratio and differential roll speed affect production rate & energy consumed per unit of surface produced Both the rolls run necessarily at the same speed Maximum feed size determines the required roll diameter ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Dry powdery solid materials are transported by a __________ conveyor. Belt Bucket None of these Screw Belt Bucket None of these Screw ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations __________ is defined as the geometric mean of the relative rejections and the relative recoveries of two minerals. Separation efficiency Selectivity index None of these Concentration ratio Separation efficiency Selectivity index None of these Concentration ratio ANSWER DOWNLOAD EXAMIANS APP
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