61. Limiting depth of bord and pillar method
62. To stop stowing which is done to avoid the jamming of the pipe?
63. Simultaneous sinking and supporting possible in this method of lining
64. The shape of hangers used in temporary lining are
65. Which type of drill bit is suitable for very hard rock
66. The main fall on L/W face generally occured after the face advance of . . . . . . . . m.
67. In level mining, a level road way along the floor of the seam and extending upto the boundary of the mine called . . . . . . . .
68. P5 explosive should have more than . . . . . . . .% of NaCl.
69. Hand packing useful upto maximum gradient.
70. The method of sinking through loose deposit of sand upto 60 m
Read More Section(Coal Mining)
Each Section contains maximum 100 MCQs question on Coal Mining. To get more questions visit other sections.