Q301
Open questionThe maximum length of trailing cable is . . . . . . . .
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Mining Engineering · all questionsDrilling and Blasting
Drilling and Blasting
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Q302
Open questionThe breathing bag of self contained breathing apparatus made of . . . . . . . . and divided into . . . . . . . . compartments of proto mark - IV.
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Q303
Open questionFor measuring velocities of air less than 1 m/sec . . . . . . . . is used.
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Q304
Open questionThe primed cartridge to be used in sinking shaft shall be carried by
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Q305
Open questionWhich of the following apparatus is suitable for drilling while approaching water logged underground workings?
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Q306
Open questionWith homotropal ventilation the velocity of air relative to coal is lessas compared to that of . . . . . . . .
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Q307
Open questionFind the height of motive column, when the temperature of upcast and down cast shafts are 40°C and 30°C respectively and shaft is 350 m deep.
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Q308
Open questionHow you reduce the resistance developed by a ventilation duct.
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Q309
Open questionReaction between nitric acid and benzene or tolune compounds yeilds.
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Q310
Open questionThe high voltage cables from surface to the substation near the pit bottom carries through . . . . . . . .
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Q311
Open questionHigher limit of inflammability of coal dust for bituminous coal is . . . . . . . .
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Q312
Open questionWhen adopting any of the methods of artificial respiration . . . . . . . . factor is very important.
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Q313
Open questionCatalysist which changes CO to
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Q314
Open questionThe operating life of chemical and breathing apparatus AUER/SAR - 30.
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Q315
Open questionIt is a sudden combustion process of great intensity accompanied by release of large quantities of heat energy and in which original gas or solid substance converted instantaniously in to gasious products . . . . . . . .
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Q316
Open questionA mixture of maganese dioxide and copper oxide called
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Q317
Open questionDipping connection in the are body joining two levels in metal mine.
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Q318
Open questionThe ventilation of drives exceeding 50 m length to be such as to dilute the nitrous fumes produced by blasting to . . . . . . . . and CO to . . . . . . . . within a period of . . . . . . . . min in long tunnel.
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Q319
Open questionPrilled ammonium Nitrate of fertilizer grade mixed with diesel oil is used for . . . . . . . . in quarries.
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Q320
Open questionA branch of air current taken from main air current called . . . . . . .
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