21. Geo phone suitable for detecting frequencies in the range of . . . . . . . .
22. In dumper operation, specific fuel oil consumption can be controlled by . . . . . . . .
23. The height of bench for 10 m3 shovel is
24. The value of ore is Rs. 600 per ton, production cost Rs. 400 per ton and cost of over burden removal is Rs. 50 per m3, the break even stripping ratio in m3/ton is
25. Which is used for stripping top soil and making shallow cuts and trenches upto a depth of 3.5 - 6 m.
26. Solomons formula used for calculating.
27. In order to avoid formation of toe in hard rocks the depth of shot hole should be
28. Limiting gredient of drag line.
29. Cut holes are called
30. The line of intersection of the quarry side with the subadjacent unmined surface. Line defines the upper contour of openings.
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