Coal Mining - Study Mode

[#216] Underground water emerging on surface in form of seepages and springs found to form loose superfical deposits of calcium carbonates called
Correct Answer

(D) Sinters

[#217] Which type of drill bit suitable for highly sillceous rock
Correct Answer

(C) Percussive bit

[#218] In B.G the full thickness of the seam can be extracted in one lift with percentage of recovery upto . . . . . . . .
Correct Answer

(D) 70 - 80

[#219] Length of holes drilled by jumbos vans from
Correct Answer

(C) 2.3 - 10.8 m

[#220] Spiral warm is used for removing
Correct Answer

(C) Broken tool