Related Questions

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
Maximum size reduction in a ball mill is done by the, __________ action.
A Attrition
B Compression
C Impact
D Cutting
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
Which of the following is not a revolving/tumbling mill used for size reduction?
A Compartment mill
B Pebble mill
C Cage mill
D Rod mill
The mechanism of size reduction by a hammer mill is by impact and attrition between the
A Grinding element & the housing
B Feed particles
C Both A & B
D Neither A nor B
A steel mill produces 180 tons of steel per month Raw materials cost for each ton of production is Tk. 1200. Other expenses of that mill are Tk. 90,000 in each month what should be the selling price of each ton of steel in order to make 10% profit?
A 1870
B 1845
C 1842
D 18145
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
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
Crushing of mineral particles is accomplished in a 'cage mill', when one or more alloy steel bars are revolved in opposite directions. It is a type of __________ mill.
A Impact
B Roll
C Vibratory
D None of these

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