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51
The strength of rock in pure stress within any aixal pressure termed as
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Answer: Option C
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52
Shield support has been employed in working a seam in one lift upto thickness of
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Answer: Option B
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53
The mining, geological and metallogical institute in India was established in the year
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Answer: Option B
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54
Increase of carbon in Iron make it
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Answer: Option A
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55
The diameter of bolt in slot and wedge types
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Answer: Option C
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56
Which type of prop can be easily withdrawn
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Answer: Option C
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57
To find and acquire a maximum number of non economic mineral deposits with a minimum cost is called
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Answer: Option B
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58
Stull support in metal mines is same as
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Answer: Option D
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59
Friction prop is . . . . . . . . type of support.
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Answer: Option D
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60
Unit of peak particle, velocity (PPV) is
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Answer: Option C
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