Q481
Open questionRoadway re-utilisation is possible in longwall face.
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Mining Engineering · all questionsCoal Mining
Coal Mining
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Q482
Open questionFor every 10 m length of horizontal pipe range there is a loss of . . . . . . . . head.
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Q483
Open questionMultisection working in descending order employ longwall method of coal extraction with . . . . . . . . roofing.
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Q484
Open questionWhich drill machine can control flow of water during drilling
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Q485
Open questionThe type of permanent lining employed where running sand encountered during sinking
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Q486
Open questionIf the pillars are not strong, they may be crushed due to sudden pressure called
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Q487
Open questionGeothermic gradient in high in
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Q488
Open questionTail gate supported by hydraulic props with 'I' section channel bars upto . . . . . . . . from face.
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Q489
Open questionWhere sand stowing adopted for stowing the goaf maximum distance between packed goaf edge and face generally . . . . . . . . proper roof control.
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Q490
Open questionThe gate belt conveyor centrally located to serve for two adjacent longwalls, progressing in same direction the combine face is
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Q491
Open questionMethod suitable for working seam under the workings of another seam with water lodged or on fire is
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Q492
Open questionThe core sizes where wire line drilling technique is adopted are for NX holes
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Q493
Open questionLimiting pressure of compressed air is . . . . . . . .
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Q494
Open questionIn hydraulic stowing, the place where mixing cone is located is called . . . . . . . .
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Q495
Open questionSingle tube core barrel is suitable for recovering core from rocks of
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Q496
Open questionCurb rings are made in to segments of . . . . . . . . length.
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Q497
Open questionThe device used to prevent un due swing off bucket in sinking shaft
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Q498
Open questionThe deviation is common in
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Q499
Open questionThe voltage of bulb provided in sinking shaft
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Q500
Open questionThis should be avoided, where temporary lining essential
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