Opencast Mining - Study Mode
[#196] In which mining we achieve, higher safety and artificial lights needed at night time.
Correct Answer
(C) Surface mining
[#197] Dangers and hezards are compared to less in mining.
Correct Answer
(A) Quarrying
[#198] The diameter of drill holes ranges from by well hole drills.
Correct Answer
(C) 125 - 300 mm
[#199] A dozer can dig . . . . . . . . meters below ground in earth or weathered rock.
Correct Answer
(B) 1.2 - 1.5 m
[#200] High wall mining enables to excavate coal.
Correct Answer
(C) By a man less cutter