Mechanical Operations Sphericity is the ratio of the surface area of a spherical particle having the same volume as the particle to the surface area of the particle. Which of the following has the maximum value of sphericity? Cube Raschig rings Sphere Cylinder (L/D = 1) Cube Raschig rings Sphere Cylinder (L/D = 1) ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Which of the following is not an ultrafine grinder (colloid mill)? Agitated mills and fluid energy mills Micronizers Toothed roll crusher Hammer mills with internal classification Agitated mills and fluid energy mills Micronizers Toothed roll crusher Hammer mills with internal classification ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations __________ mills fall in the category of tumbling mills, Ball and pebble All of these Rod and tube Compartment Ball and pebble All of these Rod and tube Compartment ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Which of the following is a coarse crusher? Gyratory crusher Tube mill Toothed roll crusher Smooth roll crusher Gyratory crusher Tube mill Toothed roll crusher Smooth roll crusher 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 grinding of large particles (upto 1.25 cms) Dry grindng of large particles in un-baffed mills Wet grinding in low viscous suspension Wet grinding in high viscous suspension Dry grinding of large particles (upto 1.25 cms) Dry grindng of large particles in un-baffed mills Wet grinding in low viscous suspension ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Grinding characteristic of a material is given by its Shatter index HGI Abrasion index Angle of repose Shatter index HGI Abrasion index Angle of repose ANSWER DOWNLOAD EXAMIANS APP
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