Full extraction can be obtained by this mining.
A. B.G method
B. Long wall
C. Open cut mining
D. Bord and Pillar
Answer: Option C
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Which test determines the sensitivity of explosive to shock and impact.
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B. Gap test
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The mining method which does not distroy the land for agriculture and residential purposes.
A. Striping
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B. 3 to 4.5
C. 1.5 to 1.7
D. None
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