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
A. __________ mill is a revolving mill divided into two or more sections by perforated partitions in which preliminary grinding takes place at one end and the finishing grinding at the discharge end.
A Compartment
B Tube
C Rod
D Pebble
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
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 $$\frac{1}{{{{\text{D}}^{2.5}}}}$$
Grinding wheel made of silicon carbide is most suitable for grinding materials of low tensile strength (e.g; tough bronze). Grinding is a __________ operation.
A Turning
B Dressing
C Forming
D Surface finishing
__________ balls capable of grinding the feed in a ball mill gives the maximum efficiency.
A Cast iron
B Minimum size
C Maximum size
D Elliptical
Wet grinding in a revolving mill __________ as compared to dry grinding.
A Gives less wear on chamber walls
B Requires more energy
C Increases capacity
D Complicates handling of the product
In case of a revolving mill, wet grinding compared to dry grinding
A Requires more energy
B Has less capacity
C Complicates handling & classification of the product
D None of these
In case of grinding in a ball mill
A Wet grinding achieves a finer product size than dry grinding
B Its capacity decreases with increasing fineness of the products
C Grinding cost and power requirement increases with increasing fineness of the products
D All of the above
Close circuit grinding by a ball mill with air sweeping employs a
A Classifier
B Cyclone separator between mill & classifier
C Both A & B
D Neither A nor B

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