Mechanical Operations A tube mill compared to a ball mill Uses much larger balls Produces a coarser product Has a higher length/diameter ratio Has a higher diameter/length ratio Uses much larger balls Produces a coarser product Has a higher length/diameter ratio Has a higher diameter/length ratio ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations What is the selectivity index, if the grade of tailings & concentrate is the same? ∞ 1 0.5 ∞ 1 0.5 ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations For a non-spherical particle, the sphericity Is defined as the ratio of surface area of a sphere having the same volume as the particle to the actual surface area of the particle Has the dimension of length Is always less than 1 Is the ratio of volume of a sphere having the same surface area as the particle to the actual volume of the particle Is defined as the ratio of surface area of a sphere having the same volume as the particle to the actual surface area of the particle Has the dimension of length Is always less than 1 Is the ratio of volume of a sphere having the same surface area as the particle to the actual volume of the particle ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations In a roll crusher, both the rolls Run either at the same or different speeds Have the same diameter All of these Are rotated towards each other Run either at the same or different speeds Have the same diameter All of these Are rotated towards each other ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Which of the following is a fine crusher? Toothed roll crusher Gyratory crusher Blake jaw crusher Dodge jaw crusher Toothed roll crusher Gyratory crusher Blake jaw crusher Dodge jaw crusher ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Tube mill compared to ball mill Uses smaller balls Produces finer products All of these Is long in comparison with its diameter Uses smaller balls Produces finer products All of these Is long in comparison with its diameter ANSWER DOWNLOAD EXAMIANS APP
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