Coal Mining - Study Mode
[#66] Major factors affecting deviation are
Correct Answer
(D) All these
[#67] The diameter of scaffold is slightly less than the . . . . . . . . diameter of the shaft
Correct Answer
(A) Outer dia of shaft
[#68] A district separated from other districts by a barrier called . . . . . . . .
Correct Answer
(D) District
[#69] For wire line drilling, length of core barrels are
Correct Answer
(B) 0.5 - 3 m
[#70] Coal mine operations are phibited if, the common boundary is within
Correct Answer
(D) 7.5 m