Introduction To Mining Engineering - Study Mode

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[#296] In room and pillar mining multiple faces are advanced but driving entries or rooms follows a definite pattern known as

(A) line of face

(B) cut sequence

(C) line of pillaring

(D) diagonal line of extraction

Correct Answer

(B) cut sequence

[#297] What is the minimum size of coal pillar when the depth of coal seam from surface remains between 240 m to 360 m and gallery width does not exceed 3 m?

(A) 28 m

(B) 28.5 m

(C) 30 m

(D) 30.5 m

Correct Answer

(B) 28.5 m

[#298] A haul ramp of 6% grade is to be constructed connecting a bench of 15 m height to the surface. If the cost of ramp construction is 1 million rupees per km, the cost of this ramp construction in million rupees will be

(A) 0.25

(B) 0.10

(C) 2.50

(D) 0.50

Correct Answer

(A) 0.25

[#299] What is the standard of lighting required for the workplace of HEMM's of opencast mine?

(A) 2 lux

(B) 3 lux

(C) 4 lux

(D) 5 lux

Correct Answer

(D) 5 lux

[#300] Ratio of water and emulsion in hydraulic fluid is

(A) 99 : 1

(B) 95 : 5

(C) 50 : 50

(D) 25 : 75

Correct Answer

(B) 95 : 5