Q121
Open questionIn blast stower; the drum driven at a speed.
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Mining Engineering · all questionsCoal Mining
Coal Mining
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Q122
Open questionOptimum length of face for the consideration of the capacity of the face, machinery is determined on the basis of
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Q123
Open questionIt is international amociation which maintain drilling standards
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Q124
Open questionSpecial methods of shaft sinking mainly classified in to . . . . . . . . types.
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Q125
Open questionpoH Broche process called
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Q126
Open questionThe stowing rate in mechanical sand stowing
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Q127
Open questionFeed mechanism is not necessary beyond the depth of . . . . . . . . m.
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Q128
Open questionForced drop shaft method employed in
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Q129
Open questionDrivage of two sets of roads and forming the pillar called . . . . . . . .
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Q130
Open questionAs a thumb rule the number of holes in a ring is . . . . . . . . times the diameter of ring in meters
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Q131
Open questionThe feed upto temper screw is possible upto
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Q132
Open questionHydraulic stowing is not successful. Where the seam is less than . . . . . . . . m depth and flatter than . . . . . . . . deg.
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Q133
Open questionFrench method employed for a seam depth of
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Q134
Open questionThe stowing efficiency in mechanical stowing is
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Q135
Open questionEach bore rod one end is male other end
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Q136
Open questionDucting pipes diameter nearly
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Q137
Open questionSolid coal pillar left intact during extraction of stook pillar called
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Q138
Open questionMaximum chances of air blast is associated with
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Q139
Open questionThe shape of the pillar that gives maximum percentage of recovery with speed reduced amount of lift for loading is
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Q140
Open questionVCR modified revision is
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