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 Pine oil used in froth floatation technique acts as a/an Activator Modifier Collector Frother Activator Modifier Collector Frother ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Short distance transportation of grain, gravel, sand, ash, asphalt etc. is done by using a __________ conveyor. Screw Flight Ribbon Slat or drag Screw Flight Ribbon Slat or drag ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Sizing of very fine particles of the order of 5 to 10 microns is done by elutriation, which is a __________ operation. Classification Sedimentation Flocculation Clarification Classification Sedimentation Flocculation Clarification ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Capacity (in tons/hr) of jaw/gyratory crusher is equal to (where, L = length of the receiving opening, cm S = greater width of the discharge opening, cm) L.S/0.087 0.01 L.S 0.087 L.S L.S L.S/0.087 0.01 L.S 0.087 L.S L.S ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Size reduction of the __________ can be suitably done by ball mills, crushing rolls and rod mills. Non-metallic ores Basic slags Metalliferrous ores Asbestos & mica Non-metallic ores Basic slags Metalliferrous ores Asbestos & mica ANSWER DOWNLOAD EXAMIANS APP
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