Coal Mining - Study Mode

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[#331] Face along the strike prefarable for stowing in seams dipping more than.

(A) 1 in 5

(B) 1 in 4

(C) 1 in 3

(D) 1 in 12

Correct Answer

(A) 1 in 5

[#332] The water garland segments provided with outlet hole into which screwed a nipple for . . . . . . . . mm diameter drain pipe

(A) 25mm

(B) 35mm

(C) 50mm

(D) 75mm

Correct Answer

(C) 50mm

[#333] For retreating L/W and B. P workings, only suitable method of methane drainage is

(A) Pack cavity method

(B) Cross measure bore hole method

(C) Hirch back method

(D) None

Correct Answer

(C) Hirch back method

[#334] No. of drills employed in shaft sinking

(A) 1 drill

(B) 2 - 3 drills

(C) 3 - 4

(D) 5 drill

Correct Answer

(B) 2 - 3 drills

[#335] In India coal seams over . . . . . . . . m thick are considered as thick seams.

(A) 4.5m

(B) 4.9m

(C) 5.2m

(D) 5.8m

Correct Answer

(A) 4.5m