Coal Mining - Study Mode

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[#226] Longwall advancing stables are usually . . . . . . . . ahead of the face.

(A) 10 - 12

(B) 6 - 8

(C) 8 - 10

(D) 4 - 6

Correct Answer

(C) 8 - 10

[#227] The undue swinging of the bucket during its travel can be prevented by means of

(A) Rider

(B) Spider

(C) Spider cone

(D) Rider cone

Correct Answer

(A) Rider

[#228] Best method of mining in seam of 8.5 m thick.

(A) B/P

(B) L/W

(C) L/W sublevel caving

(D) Combination of B/P and L/W

Correct Answer

(C) L/W sublevel caving

[#229] Roof is easily cavable if proto dyakor index is

(A) 4 - 6

(B) 6 - 7

(C) 7 - 8

(D) 8 - 9

Correct Answer

(A) 4 - 6

[#230] Permanent lining generally not required where the shaft are

(A) Weak

(B) Strong

(C) Loose

(D) Friable

Correct Answer

(B) Strong