Coal Mining - Study Mode

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[#251] Wire line drilling technique reduces the

(A) Vibration

(B) Core recovery

(C) Time

(D) Flow

Correct Answer

(C) Time

[#252] The front abutment exertsa peak pressure . . . . . . . . meters in advance of the L/W face

(A) 1 to 1

(B) 1 to 2

(C) 1 to 4

(D) 1 to 3

Correct Answer

(D) 1 to 3

[#253] The water tank have a capacity required for hydraulic stowing . . . . . . . . days requirement of water.

(A) 1

(B) 2

(C) 3

(D) 6

Correct Answer

(A) 1

[#254] Lignite deposits in tertiary rocks of Neyveli is of

(A) Miocene period

(B) Eocene period

(C) Pleistocene period

(D) Oligocene period

Correct Answer

(A) Miocene period

[#255] Seam thickness suitable for plough operation.

(A) 0.2 - 2 m

(B) 0.6 - 3 m

(C) 1 - 3 m

(D) 3 - 8 m

Correct Answer

(C) 1 - 3 m