Coal Mining - Study Mode

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[#121] The saw toothed crown, drill holes of diameter not less than . . . . . . . . are possible.

(A) 300 mm

(B) 200 mm

(C) 150 mm

(D) 100 mm

Correct Answer

(C) 150 mm

[#122] Sand bunkers have a capacity of . . . . . . . . days requirements of sand.

(A) 1

(B) 2

(C) 3

(D) 6

Correct Answer

(B) 2

[#123] Most common length of face in longwall mining.

(A) 30 - 100 m

(B) 90 - 300 m

(C) 100 - 400 m

(D) 60 - 200 m

Correct Answer

(D) 60 - 200 m

[#124] The wattage of bulb in a cluster of each bulb

(A) 100W

(B) 80W

(C) 60W

(D) 40W

Correct Answer

(A) 100W

[#125] The required water for 1 ton of sand in hydraulic sand stowing is . . . . . . . .

(A) 800 l

(B) 600 l

(C) 1100 l

(D) 1200 l

Correct Answer

(C) 1100 l