Q381
Open questionThe MCDR are not applicable to . . . . . . . .
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Mining Engineering · all questionsDrilling and Blasting
Drilling and Blasting
practice.
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Q382
Open questionThe coefficient of friction in smooth lined roadway . . . . . . . .
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Q383
Open questionCoal dust explosions can be prevented by
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Q384
Open questionThese type of explosives commonly used in under ground coal mines.
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Q385
Open questionExplosives are used in mines for . . . . . . . . coal/mines.
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Q386
Open questionThe percentage of charcoal in gun powder.
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Q387
Open questionThe cotton wool in gas mask removes . . . . . . . .
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Q388
Open questionA fan circulates 6000 m3/min of air at a pressure of 20 mm of Hg. Air power in HP will be
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Q389
Open questionThe weight strength of blasting gelatine is . . . . . . . .
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Q390
Open questionTo control the fly rock the blasting technique adopted is . . . . . . . .
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Q391
Open questionThe quantity of air to be circulated by an auxiliary fan depends upon the . . . . . . . .
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Q392
Open questionWhirling hygrometer is rotated at a speed of . . . . . . . .
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Q393
Open questionAir velocities in conveyor roads and loading points . . . . . . . . m/sec.
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Q394
Open questionThere is a possibility of explosion within . . . . . . . . hours of sealing of III degree gassy mine.
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Q395
Open questionProto mark IV apparatus is designed for . . . . . . . . use.
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Q396
Open questionThe minimum pillar to pillar distance, if the depth of seam is 250 m and gallery width is 4.2 m.
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Q397
Open questionThe resistance in parallel road ways given by formula
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Q398
Open questionShattering effect produced by using . . . . . . . .
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Q399
Open questionThe simplest and effective method which can be used during emergency, the rescure blows air forcebly into mouth of patient . . . . . . . .
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Q400
Open questionThe overall efficiency (or) useful effect . . . . . . . .
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