51. The gradient of the cross cut should not be less than
52. Submerged sand deposit can be mined by
53. Maximum compressive strength of cavable roof is
54. Coal seams said to be contiguous, if the two seams are separated by a parting of less than.
55. The portion of the face at its end. Where cutting starts
56. The type of lining employed where high pressure of water to be resisted in a sinking pit
57. The stowing efficiency in hydraulic sand stowing is
58. The number of pillars in a panel, can be extracted to the maximum percentage in depilling with in the . . . . . . . . period.
59. For deeper mines the sand : water ratio in sand stowing is . . . . . . . .
60. Usual length of drill rods
Read More Section(Coal Mining)
Each Section contains maximum 100 MCQs question on Coal Mining. To get more questions visit other sections.