Coal Mining - Study Mode

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[#176] The thickness of thickest seam in India is in meters.

(A) 140

(B) 152

(C) 162

(D) 172

Correct Answer

(C) 162

[#177] Each drill consumes nearly . . . . . . . . of free air per minute work at time in 6 m diameter shaft

(A) 1 m 3

(B) 2 m 3

(C) 3 m 3

(D) 6 m 3

Correct Answer

(C) 3 m 3

[#178] Any excavation made or being made in a mine for search of or obtaining coal called

(A) Working

(B) Face

(C) Mine

(D) Shaft

Correct Answer

(A) Working

[#179] Construction of brick wall is carried out from with the help of . . . . . . . . in permanent lining.

(A) Rider

(B) Spider

(C) Scaffold

(D) Garland

Correct Answer

(C) Scaffold

[#180] The goaf subsidence can be reduced to about . . . . . . . . of the amount caused by caving in hydraulic stowing.

(A) $$frac{1}{2}$$

(B) $$frac{1}{3}$$

(C) $$frac{1}{4}$$

(D) $$frac{1}{5}$$

Correct Answer

(D) $$frac{1}{5}$$