Q461
Open questionThe size of the incline usually, if it is endless haulage way.
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Mining Engineering · all questionsDrilling and Blasting
Drilling and Blasting
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Q462
Open questionThe direction of rotation of axial flow fan simply changed by . . . . . . . .
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Q463
Open questionThe law related to H.P speed or quantity is . . . . . . . .
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Q464
Open questionCross measure drifts in coal mines usually of . . . . . . . .
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Q465
Open questionHigh rank coal with high carbon content (say over 85% d.m.m.f basis) is liable to self heating is . . . . . . . .
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Q466
Open questionIn which DGMS Circulars the conditions for blasting in fire areas in opencast coal mine has been stipulated?
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Q467
Open questionWhat is ventilation efficiency quotient
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Q468
Open questionIt is an area in a mine having number of working faces.
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Q469
Open questionThe ratio between power output to power input called . . . . . . . .
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Q470
Open questionIt is observed that the coal containing less than . . . . . . . of volatile matter, calculated on dry ash free basis is not likely to propagate flame.
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Q471
Open questionStratum is reffered as inclined if general inclination in between.
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Q472
Open questionFor every 1% of fire damp . . . . . . . .% of additional stone dust is required for efficient stone dusting.
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Q473
Open questionUpper limit of methane air mixture.
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Q474
Open questionThe relation between pressure, resistance and quanity is expressed by the formula.
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Q475
Open questionThe amount of innert dust required to be mixed with the coal dust to make it non inflammable called
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Q476
Open questionThe breathing bag capacity of BG 174 . . . . . . . . in litres.
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Q477
Open questionThe ratio between the effective w.g and the theoritical w.g produced by fan with same dimensions and running at the same speed called . . . . . . . .
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Q478
Open questionWhich of the following explosive are recommended for deep hole blasting?
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Q479
Open questionA detonating fuse detonated by a
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Q480
Open questionWhich of the following reagents do share around 75% in an explosive?
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