These things are employed in the blast holes of small, size, blasted with gun powder, mineral loaded in to tubs hauled by locos.
A. Manual mining
B. Mechanised open cast
C. Semi mechanised open cast
D. Heavily mechanised open cast
Answer: Option A
A. Manual mining
B. Mechanised open cast
C. Semi mechanised open cast
D. Heavily mechanised open cast
Answer: Option A
Which test determines the sensitivity of explosive to shock and impact.
A. Rifle bullet test
B. Gap test
C. Ageing test
D. Water resistance test
The mining method which does not distroy the land for agriculture and residential purposes.
A. Striping
B. Open cast
C. Placer
D. Long wall
The output capacity of a drag line with 23 to 30m3 is million cu.m per year is
A. 0.25 to 0.75
B. 3 to 4.5
C. 1.5 to 1.7
D. None
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