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
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 $$\frac{1}{{{{\text{D}}^{2.5}}}}$$
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
__________ mill is not a revolving mill.
A Pebble
B Compartment
C Cage
D Tube
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

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