Coal Mining - Study Mode
[#371] Under ground gassification, development done towards
Correct Answer
(A) Rise
[#372] Cable drilling employed commonly employed for holes deeper than
Correct Answer
(A) 30m
[#373] In drilled shafts all the sinking work can be carried out by
Correct Answer
(A) Sequence controlled automatic machines
[#374] Continuous record of bore hole deviation from top to bottom by an instrument by
Correct Answer
(A) Borehole camera
[#375] While driving slices, what should be the minimum thickness of rib of coal to be left against adjacent goaf.
Correct Answer
(A) 1.8m