Coal Mining - Study Mode
[#111] Which is used for raising and lowering rods of circular cross section
Correct Answer
(A) Bull dog
[#112] The method of sinking employed when there is a ground filling problem with considerable inflow of water upto a depth of 30 m
Correct Answer
(D) Pneumatic caisson
[#113] Bord and pillar method of mining of working cod is applicable in
Correct Answer
(D) Geologically distrubed coal seams
[#114] Freezing process introduced in the year
Correct Answer
(B) 1884
[#115] What is the meaning of SWL in material handling
Correct Answer
(B) Safe working load