Coal Mining - Study Mode

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[#366] Usual thickness of brick lining vanes from

(A) 0.4 - 0.8 m

(B) 0.4 - 0.6 m

(C) 0.3 - 0.5 m

(D) 0.4 - 0.9 m

Correct Answer

(B) 0.4 - 0.6 m

[#367] Shaft sides buttons are fixed at intervals of . . . . . . . . for support of cables, delivery pipes, etc.

(A) 6 - 9 m

(B) 9 - 16 m

(C) 16 - 30 m

(D) 30 - 40 m

Correct Answer

(B) 9 - 16 m

[#368] The trend of coal production in India always been on increase except the year . . . . . . . . when production fall down, and packed up again slightly.

(A) 1977

(B) 1984

(C) 1990

(D) 1976

Correct Answer

(A) 1977

[#369] The type of boring suitable for drilling to a depth of 3000 m with a hole dia of 200 mm

(A) Diamond

(B) Churn drilling

(C) Percussive

(D) Chilled shot

Correct Answer

(A) Diamond

[#370] The thickness of stowing pipes used in pneumatic stowing.

(A) 5 mm

(B) 8 mm

(C) 12 mm

(D) 10 mm

Correct Answer

(D) 10 mm