71. Mining involves mining and washing together in unconsolidated and semi consolidated rock near surface.
72. A haul ramp of 6% grade to be constructed connected to a bench of 15 m height to surface. The cost of ramp construction is 1 million rupees per km; the cost of the ramp construction in million ruppes will be . . . . . . . .
73. Limiting gredient for continuous surface miner is . . . . . . . .
74. Refraction seismograph operates on the principle of . . . . . . . .
75. Small pillars of rocks excavated are left for measurement called . . . . . . . .
76. The output capacity of a drag line with 4.5 to 7.5 cu.m is million cu.m per year
77. In which mining the mineral exposed is compleatly extracted.
78. High wall mining currently operated at
79. Machines which have to move frequently from one place to place operated by . . . . . . . . engines.
80. Stacker is commonly used to work in association with
Read More Section(Opencast Mining)
Each Section contains maximum 100 MCQs question on Opencast Mining. To get more questions visit other sections.