Related Questions

For achieving maximum capacity of the ball mill, the ball charge should be equal to about __________ percent of the ball mill volume.
A 10
B 25
C 50
D 75
Power required to drive a ball mill with a particular ball load is proportional to (where, D = diameter of ball mill )
A D
B $$\frac{1}{{\text{D}}}$$
C D2.5
D $$\frac{1}{{{{\text{D}}^{2.5}}}}$$
In a ball mill, the volume occupied by the balls (when the mill is stopped) is about __________ percent of the volume of the mill.
A 35
B 50
C 70
D 85
The main differentiation factor between tube mill and ball mill is the
A Length to diameter ratio
B Size of the grinding media
C Final product size
D Operating speed
Tube mill compared to ball mill
A Produces finer products
B Is long in comparison with its diameter
C Uses smaller balls
D All of the above
A tube mill compared to a ball mill
A Has a higher length/diameter ratio
B Produces a coarser product
C Has a higher diameter/length ratio
D Uses much larger balls
A tube mill as compared to a ball mill
A Employs smaller balls
B Gives finer size reduction but consumes more power
C Has larger length/diameter ratio (>2 as compared to 1 for ball mill)
D All of the above
Size reduction of the __________ can be suitably done by ball mills, crushing rolls and rod mills.
A Metalliferrous ores
B Non-metallic ores
C Basic slags
D Asbestos & mica
Maximum size reduction in a fluid energy mill is achieved by
A Compression
B Interparticle attrition
C Cutting
D Impact
When the weight of a ball inside the ball mill is just balanced by the centrifugal force,
A The ball abandons its circular path for a parabolic path
B The ball abandans its parabolic path for a circular path
C The ball continues to move on a circular path
D The ball continues to move on a parabolic path

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