Q101
Open questionAn explosive used in quarries has to be
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Mining Engineering · all questionsDrilling and Blasting
Drilling and Blasting
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Q102
Open questionDry powder extinguishers used to deal with fire of type . . . . . . . .
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Q103
Open questionThe distance between Buffer to interconnected stop block and runaway switch is nearly equals to a length of set of tubs plus.
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Q104
Open questionThe best arrangement is an air lock which encloses the shaft.
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Q105
Open questionReducing agent in slurry explosive is
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Q106
Open questionTo ventilate narrow places driven in advance of the general ventilation, particularly in B & P workings . . . . . . . . are used.
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Q107
Open questionIn this stage of self heating of coal the cricket and small insects show increased activity and chirping.
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Q108
Open questionFor coal seam having more inclination, shaft may be located in . . . . . . . . property.
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Q109
Open questionHealth monitoring is monitoring system which is used
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Q110
Open questionThe coefficient of friction in a shaft with brick lined . . . . . . . .
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Q111
Open questionSpacing to burden ratio is normally kept at . . . . . . . .
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Q112
Open questionIn case of opencast working where any part of a public road or railway lies within the danger zone then there are some conditions imposed on charging or firing under current CMR 2017. Which of the following do not come under these conditions?
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Q113
Open questionA roadway in stone connecting two or more coal seams is called . . . . . . . .
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Q114
Open questionA flame proof enclosure is used for electrical apparatus at higher voltage exceeding . . . . . . . . volts.
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Q115
Open questionA cylinder of oxygen is of 2.5 Iit capacity holding oxygen under a pressure of . . . . . . . . bars.
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Q116
Open questionThe increase in quantity of air due to expansion in the up cast shaft can be roughly taken as . . . . . . . .
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Q117
Open questionNumber of shelves in heavy weight barrier.
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Q118
Open questionCO/O2 deficiency ratio is . . . . . . . . normal to coal mine.
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Q119
Open questionQuantity of air at the working face can be increased by introducing.
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Q120
Open questionWhen O2 falls to 5% or less and methane rises to 30% N more behind the stopping, the samples collected at intervals of . . . . . . . .
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