Air consumption by down the hole hammer drills at . . . . . . . .
A. 7 kgf/cm2 is 5.5m3/min
B. 9 kgf/cm2 is 6.5m3/min
C. 10 kgf/cm2 is 8.5m3/min
D. 6 kgf/cm2 is 4m3/min
Answer: Option A
This Question Belongs to Mining Engineering >> Opencast Mining
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