81. Now a days the wagon drills operated by
82. One of the secondary blasting technique is . . . . . . . .
83. The angle of slope from bench wall from the horizontal called
84. The following nomeneclature 20/90 for drag line is related to . . . . . . . .
85. This type of fuel not being washed to improve heat value.
86. Number of holes drilled by two persons is sandstone with a depth of 1.2 - 1.5 m.
87. The following excavator will be used for a bench height of 20 m to 30 m of soft rock formation.
88. Most suitable for ripping rocks and medium hard rocks below 5 hardness scale which are laminated and stratified is . . . . . . . .
89. The slope angle for hard and compact ground should not be more than
90. Which one of the following is not related to open cast mining.
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