Coal Mining - Study Mode

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[#201] Deviation may occur in a hole of small depth as . . . . . . . .

(A) 10 m

(B) 20 m

(C) 40 m

(D) 100 m

Correct Answer

(D) 100 m

[#202] The feed upto temper screw is possible upto

(A) 1 m

(B) 1.2 m

(C) 1.5 m

(D) 2.2 m

Correct Answer

(B) 1.2 m

[#203] Hydraulic stowing is not successful. Where the seam is less than . . . . . . . . m depth and flatter than . . . . . . . . deg.

(A) 200, 5

(B) 100, 5

(C) 100, 10

(D) 200, 10

Correct Answer

(B) 100, 5

[#204] French method employed for a seam depth of

(A) 20 m

(B) 30 m or more

(C) 50 m or more

(D) 60 m or more

Correct Answer

(D) 60 m or more

[#205] The stowing efficiency in mechanical stowing is

(A) 50%

(B) 60%

(C) 73%

(D) 80%

Correct Answer

(B) 60%