91. For every one degree deviation of slope angle changes the volume of quarried ground by above . . . . . . . .
92. The width of the floor should not be less than the height of . . . . . . . .
93. Jack hammer drills the holes of
94. Where the height of shakhi pillar exceed 1.5 m the base of witness pillar should be less than in diameter.
95. In which mining gives high output per man shift.
96. Maximum capacity of the bucket of BWE.
97. The following equipment com moly used for over casting (or) side casting.
98. The ripper tractor speed during ripping is . . . . . . . .
99. Lease holder can not abandon a mine (or) part there of
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