Coal Mining - Study Mode
[#326] Mud bucket not necessary when supply of flushing water
Correct Answer
(C) Plenty
[#327] First indication of roof weighting for regular fracturing roof in goaf.
Correct Answer
(B) Dull and dummy sound
[#328] The size of bricks generally construction of brick well are
Correct Answer
(C) 225 × 115 × 75 mm
[#329] Velocity of slurvy instowing has to be kep at a minimum of . . . . . . . .
Correct Answer
(B) 2 m/sec
[#330] For rotory drilling the drill rods are . . . . . . . . section
Correct Answer
(C) Circular