Metal Mining - Study Mode

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[#111] If the depth of the shaft exceeds 1000 m but not 1500 m, no winding rope shall be used or continued to use, if its factor of safety is becomes less than . . . . . . . . in metal mines.

(A) 9

(B) 10

(C) 6

(D) 7

Correct Answer

(C) 6

[#112] In cut and fill stoping is done by . . . . . . . .

(A) Under hand method

(B) Caving method

(C) Over hand

(D) All the above

Correct Answer

(D) All the above

[#113] The method of stoping suitable to extract thick ore body strong ore, stable handling and footwall steeply dipping ore is . . . . . . . .

(A) Open stoping

(B) Sub level

(C) Shrinkage

(D) Cut and fill

Correct Answer

(B) Sub level

[#114] The friable rock in cut and fill method is supported by . . . . . . . .

(A) Hydraulic props

(B) Cable bolting

(C) Roof bolts

(D) Stull members

Correct Answer

(B) Cable bolting

[#115] The number of persons required for collection of samples in u/g.

(A) 2 or 3

(B) 1

(C) 4

(D) 5

Correct Answer

(A) 2 or 3