Mechanical Operations __________ is used for producing a thick suspension from a thin slurry. Cartridge filter Plate and frame filter press Rotary drum vacuum filter Pressure filter thickener Cartridge filter Plate and frame filter press Rotary drum vacuum filter Pressure filter thickener 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 high viscous suspension Dry grindng of large particles in un-baffed mills Wet grinding in low viscous suspension Dry grinding of large particles (upto 1.25 cms) Wet grinding in high viscous suspension Dry grindng of large particles in un-baffed mills Wet grinding in low viscous suspension Dry grinding of large particles (upto 1.25 cms) ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Optimum ratio of operating speed to critical speed of a trommel is 1.33-1.45 0.5-2 1.5-2.5 0.33-0.45 1.33-1.45 0.5-2 1.5-2.5 0.33-0.45 ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations According to Bond crushing law, the work required to form particle of size 'D' from very large feed is (where (S/V)p and (S/V)f are surface to volume ratio of the product and feed respectively). (S/V)p (S/V)f √(S/V)p (S/V)²p (S/V)p (S/V)f √(S/V)p (S/V)²p ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Cake resistance is Independent of pressure drop Important in the beginning of filtration None of these Decreased with the time of filtration Independent of pressure drop Important in the beginning of filtration None of these Decreased with the time of filtration ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Rittinger's crushing law states that Work required to form a particle of a particular size is proportional to the square root of the surface to volume ratio of the product Work required to form a particle of any size is proportional to the square of the surface to volume ratio of the product For a given machine and feed, crushing efficiency is dependent on the size of the feed & product Work required in crushing is proportional to the new surface created Work required to form a particle of a particular size is proportional to the square root of the surface to volume ratio of the product Work required to form a particle of any size is proportional to the square of the surface to volume ratio of the product For a given machine and feed, crushing efficiency is dependent on the size of the feed & product Work required in crushing is proportional to the new surface created ANSWER DOWNLOAD EXAMIANS APP
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