*$_Work index is the gross energy (kWh/tonne of feed) necessary to reduce a very large feed to such a size that 80% of product particles will pass through a 0.1 mm screen. The value of work index determined for wet grinding should be multiplied with __________ to get the same for dry grinding.?

*$_Work index is the gross energy (kWh/tonne of feed) necessary to red

1.	*$_Work index is the gross energy (kWh/tonne of feed) necessary to reduce a very large feed to such a size that 80% of product particles will pass through a 0.1 mm screen. The value of work index determined for wet grinding should be multiplied with __________ to get the same for dry grinding.?
A.	1.0
B.	0.5
C.	1.34
D.	4.34
Answer» D. 4.34