Mechanical Operations __________ is defined as the geometric mean of the relative rejections and the relative recoveries of two minerals. Concentration ratio Separation efficiency Selectivity index None of these Concentration ratio Separation efficiency Selectivity index None of these ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Size reduction of ice and gypsum can be accomplished suitably by a __________ crusher. Blake jaw None of these Toothed roll Gyratory Blake jaw None of these Toothed roll Gyratory ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Energy consumed for crushing one ton of material ranges from __________ kWh. 0.5 to 1.5 4 to 5 2 to 3.5 0.01 to 0.1 0.5 to 1.5 4 to 5 2 to 3.5 0.01 to 0.1 ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Colloid mills achieve size reduction mainly by Compression Attrition Impact Cutting Compression Attrition Impact Cutting ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Ore concentration by jigging is based on the difference in the __________ of the particles. Shape None of these Specific gravities Wettability Shape None of these Specific gravities Wettability ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Actual operating speed of a ball mill may vary from 65 to 80% of the critical speed. Which of the following duties would require the ball mill to be operated at maximum percentage of critical speed? Wet grinding in low viscous suspension Wet grinding in high viscous suspension Dry grinding of large particles (upto 1.25 cms) Dry grindng of large particles in un-baffed mills Wet grinding in low viscous suspension Wet grinding in high viscous suspension Dry grinding of large particles (upto 1.25 cms) Dry grindng of large particles in un-baffed mills ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS