11. Deflagration is
12. Can you guess on the minimum production per day by a 10 m3 electric rope shovel with 85 tonne dumper in India?
13. Setting of unloader valve of power pack can be changed by
14. Sublevel caving with semi-mechanized wire-netting system was first practiced in which of the following colliery in India with the help of French mining engineers?
15. The point beyond which the mineral/coal can not be economically extracted is called
16. In Khaskaranpura, the cutting of narrow drivages with the help of coal picks is known as
17. In the above question. the safety factor of the pillar is
18. Use of oxyacetylene flame wielding/cutting can be done in 3rd degree gassy mine, if
19. Maximum number of faces available for working in a shift in a 5 heading bord and pillar development district is
20. In Bord & Pillar panels worked in conjunction with hydraulic stowing, extract line preferred is
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