Coal Mining - Study Mode
[#276] The groove made by coal cutting machine is called
Correct Answer
(B) Web
[#277] On the mixing cone, there is a screen to prevent pebbles larger than . . . . . . . . mm size from getting into shaft range with sand water mixing.
Correct Answer
(D) 25mm
[#278] Hangers placed at intervals of
Correct Answer
(B) 1.2m
[#279] The power available in under ground at a voltage of
Correct Answer
(C) $$frac{{440}}{{550V}}$$
[#280] The coal mining areas where the maximum drilling depth is upto
Correct Answer
(B) 1000m