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
Mechanical Operations Specific surface area is the surface area of a unit __________ of materials. Volume Neither A nor B Weight Either A or B Volume Neither A nor B Weight Either A or B ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Electrical energy consumed by a jaw crusher is not a function of the Average product size None of these Average feed size Machine capacity Average product size None of these Average feed size Machine capacity ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations The most suitable filter for the removal of very small amount of precipitate from very large volumes of water is the __________ filter. Plate & frame Rotary Vacuum Sand Plate & frame Rotary Vacuum Sand ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations The resistance offered by the filter used in a bag filter is proportional to (where, c = dust concentration, and s = particle size ) S . c 1/s . c S/c C/s S . c 1/s . c S/c C/s ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Which of the following size reduction equipments employs mainly attrition for ultrafine grinding? All of these Micronizer Fluid energy mill Jet mills All of these Micronizer Fluid energy mill Jet mills ANSWER DOWNLOAD EXAMIANS APP
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