51. The following factor is considered for calculation of cycle time of any excavating machine.
52. Tension crack of 5 m depth behind a rock slope crest is completely filled with water. Find the horizontal force exerted on a line of slope length by the water in tension crack.
53. Speed of crawler mounted machinery are . . . . . . . .
54. The ratio of weight per unit volume of rock mass in bench and weight per unit volume of loose rock mass after blasting called
55. How much time a drag line may take to complete a cycle for a single pass.
56. Type of drill rods employed for Jack hammer.
57. Number of persons required to make the drill holes with Jack hammer.
58. Crawler mounted machinery works.
59. Truck dispatch system is being introduced for the following.
60. Horizontal ledges situated on the now productive side on open cast pit and serves to accommodate the transport roads called . . . . . . . .
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