Coal Mining - Study Mode

[#186] Coal mine operations are prohibited if the depth of cover is less than
Correct Answer

(A) 15 m

[#187] The method of mining not suitable for working coaking coal.
Correct Answer

(D) Room and pillar

[#188] In which line of extraction the stook is under excessive pressure and liable to crush.
Correct Answer

(B) Arrow head

[#189] Alluminium hollow drill rods can be used in rotary drilling
Correct Answer

(B) Yes

[#190] Drift theory is one of the reliable theory for formation of coal seam, other theory is
Correct Answer

(B) In-situ theory