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11
Which type of drilling pattern is generally followed in solid blasting face?
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Answer: Option D
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12
Maximum accidents in Indian mines is due to
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Answer: Option A
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13
Square pillars in B & P panel are of size 30 m centre to centre and the galleries are of width 4 m. The tributary area for each pillar in m2 is
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Answer: Option A
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14
Which of the following faces are not permitted to run in B & P district?
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Answer: Option B
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15
The full form of 'RMR' is
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Answer: Option C
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16
In a 2nd degree gassy mine the velocity of air measured at the maximum span of long wall face should be
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Answer: Option D
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17
The equipment that is NOT used in hard rock metal mining drivage is
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Answer: Option D
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18
In case of metalliferous mines, if depth of a shaft exceeds 1000 m but not 1500 m, no winding rope shall be used or continued in use, if its F.O.S. is or becomes less than
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Answer: Option D
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19
A lease holder cannot abandon a mine or part unless
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Answer: Option B
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20
Over speeding of coal tubs are restricted by
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Answer: Option B
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