41. High wall mining has been successful for wining of
42. A plane failure occurs due to
43. The output capacity of adrag line with 11.5 to 15 m3 is million cu.m per year is
44. Which shovel is higher cost.
45. The process of under water mining of sand, clay, tin and place deposit of gold known as
46. 'Crowding' means inrespect of dipper shovel.
47. Full extraction can be obtained by this mining.
48. Jack hammer is employed to drill holes upto a depth of
49. Crawler unit is advantage in case of
50. Fill factor for the drag line is . . . . . . . .
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