41. The angle which a plane joining the crest of the quarry which the toe of the bottom most bench makes from the borizontal.
42. In ultimate pit analysis the most widely used method is
43. Permanent and semi permanent machines always powered by . . . . . . . .
44. The output of the shovel with 2 cubic meter bucket is cu.m per year.
45. The following requirements of electric power supply system in surface mines are
46. Which motor improves power factor
47. The diameter and depth of blast holes are generally kept constant depending on . . . . . . . . of equipment.
48. Machines using crawler chains are not allowed to cross public-roads of they posses.
49. Ripper is essentially of . . . . . . . . mounted.
50. C.S.R means
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