Coal Mining - Study Mode

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[#166] The latest technologies employed in shaft sinking machines suitable of diameters a shaft of excavated diameter by drill shafts are

(A) 6.2 - 8 m

(B) 4 - 6 m

(C) 4 - 7 m

(D) All these

Correct Answer

(A) 6.2 - 8 m

[#167] The number of pillars in a panel varies from

(A) 5 - 10

(B) 10 - 15

(C) 12 - 30

(D) 40 - 60

Correct Answer

(C) 12 - 30

[#168] Hydrogenation first achieved by the scientist

(A) Argeous

(B) Bergius

(C) Kent

(D) Lapase

Correct Answer

(B) Bergius

[#169] No such working shall exceed . . . . . . . . in width a height near water logged area.

(A) 2.4 m

(B) 2.3 m

(C) 2.8 m

(D) 2.6 m

Correct Answer

(A) 2.4 m

[#170] In depillaring by caving, the type of splitting preferred is

(A) Strike split

(B) Dip rise split

(C) Either A or B

(D) None

Correct Answer

(B) Dip rise split