Q421
Open questionThe explosive which produce flame of long duration after blasting, burning particles remain contact with surround atmosphere
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Mining Engineering · all questionsDrilling and Blasting
Drilling and Blasting
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Q422
Open questionPermitted limit of speed of blade tips near the residential areas in axial flow fan . . . . . . . . in m/min.
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Q423
Open questionMetallic powders in explosive composition act as . . . . . . . .
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Q424
Open questionWhich of the following agent is used to give sheath in a permitted sheathed explosive?
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Q425
Open questionCordtex fuse fired by . . . . . . . .
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Q426
Open questionHopacalite used as
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Q427
Open questionThe detonator inserted in explosive cartridge called
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Q428
Open questionSurface screening plants and tipplers should be atleast . . . . . . . . away from the intake shaft.
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Q429
Open questionIt is the ability of coal dust to cause a flame to spread away from source of ignition called . . . . . . . .
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Q430
Open questionThe instrument to determine the distance travelled by air in a given time is . . . . . . . .
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Q431
Open questionWhen contra rotating fan reversed, the fan produces nearly . . . . . . . .% of normal air quantity.
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Q432
Open questionThin seam the thickness of coal less than . . . . . . . .
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Q433
Open questionSelf contained breathing apparatus is a . . . . . . . . type apparatus.
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Q434
Open questionIf the atmosphere contain full O2 the apparatus used by weaver to protect himself from poisonous atmosphere containing CO and other toxic gases in small percentages called . . . . . . . .
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Q435
Open questionNumber of cylinders in the Novex reviving apparatus.
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Q436
Open questionThe deepest shaft in coal mine in this country is at . . . . . . . .
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Q437
Open questionMine air is coursed to the working places by the use of . . . . . . . .
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Q438
Open questionPermitted explosives are always
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Q439
Open questionThe quantity of coal dust amounts to rise in air as thick cloud is . . . . . . . . of space.
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Q440
Open questionTo start a fire the conditions essential are
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