Mechanical Operations What is the critical rotation speed in revolutions per second, for a ball mill of 1.2 m diameter charged with 70 mm dia balls? 0.5 2.76 1 0.66 0.5 2.76 1 0.66 ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations __________ are used for the separation of coarse particles from a slurry of fine particles. Hydrocyclones Thickeners Classifiers Decanters Hydrocyclones Thickeners Classifiers Decanters 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? Dry grinding of large particles (upto 1.25 cms) Wet grinding in low viscous suspension Wet grinding in high viscous suspension Dry grindng of large particles in un-baffed mills Dry grinding of large particles (upto 1.25 cms) Wet grinding in low viscous suspension Wet grinding in high viscous suspension Dry grindng of large particles in un-baffed mills ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Filter medium resistance is important during the __________ of filtration. None of these Final stages Early stages Entire process None of these Final stages Early stages Entire process ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Which of the following is not a non-metalliferous mineral? Cassiterrite Calcite Quartz Fluorspar Cassiterrite Calcite Quartz Fluorspar ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Sorting classifiers employing differential settling methods for separation of particles make use of the differences in their Particle sizes Terminal velocities None of these Densities Particle sizes Terminal velocities None of these Densities ANSWER DOWNLOAD EXAMIANS APP
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