Q441
Open questionThe gas which settle at floor level below the fire stopping is
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Mining Engineering · all questionsDrilling and Blasting
Drilling and Blasting
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Q442
Open questionWeight of air leg mounted on jack hammer.
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Q443
Open questionWhich of the activities should be borne in mind, for any mining activity.
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Q444
Open questionExplosions of coal dust alone (in the absence of firedamp) have been comparatively . . . . . . . .
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Q445
Open questionThe axial flow fan blades are set on to the plane of . . . . . . . .
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Q446
Open questionThe methods employed to deal with fires are
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Q447
Open questionDint header suitable for height of roadway not more than . . . . . . . .
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Q448
Open questionIf CO/O2 deficiency ratio is 1% it indicates existence of . . . . . . . .
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Q449
Open questionRescue brigate consists of . . . . . . . . members including leader.
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Q450
Open questionVentilation door must be arranged to close automatically and with this object frame of the door is so fitted that the top leans about forward in the direction of air pressure.
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Q451
Open questionIn a mine all signalling bells, telephones exploders and relays are . . . . . . . . safe construction.
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Q452
Open questionAir screw fan is more suited for low w.g and high . . . . . . . .
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Q453
Open questionIt is important factor of explosive when selecting an explosive for a perticular use.
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Q454
Open questionThe Origin of the formation of coal is . . . . . . . .
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Q455
Open questionAir lock consists of . . . . . . . . doors.
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Q456
Open questionAll bright coals with 25% more V.M and 7 to 15% of moisture are prone to
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Q457
Open questionThe breathing bag of proto mark IV apparatus, which serves as . . . . . . . .
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Q458
Open questionEvery electrical shot-firing apparatus shall be so constructed that the firing circuit is made or broken automatically by means of which of the following?
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Q459
Open questionPush botton type bye pass valve fitted in proto . . . . . . . .
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Q460
Open questionResistance of a road way is
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