Mechanical Operations Ore concentration by jigging is based on the difference in the __________ of the particles. Specific gravities Shape Wettability None of these Specific gravities Shape Wettability None of these ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Pebble mills are tumbling mills widely used for grinding in the manufacture of paints & pigments and cosmetic industries, where iron contamination in the product is highly objectionable. Pebbles used in pebble mill are made of Stainless steel Bronze Concrete Flint or porcelain Stainless steel Bronze Concrete Flint or porcelain ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Which of the following must be stored in silos and not in open yard? Sand Coke breeze None of these High V.M. bituminous coal Sand Coke breeze None of these High V.M. bituminous coal ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations What is the usual value of angle of nip for crushing of ordinary rock in smooth steel crushing rolls? 32° 46° 40° 16° 32° 46° 40° 16° ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Which of the following is not used as a filter medium in case of corrosive liquids? Metal cloth of monel or stainless steel Glass cloth Cotton fabric Nylon Metal cloth of monel or stainless steel Glass cloth Cotton fabric Nylon 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 grindng of large particles in un-baffed mills Wet grinding in high viscous suspension Dry grinding of large particles (upto 1.25 cms) Wet grinding in low viscous suspension Dry grindng of large particles in un-baffed mills Wet grinding in high viscous suspension Dry grinding of large particles (upto 1.25 cms) Wet grinding in low viscous suspension ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS