Drilling And Blasting - Study Mode

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[#286] Reaction between nitric acid and benzene or tolune compounds yeilds.

(A) AN

(B) Collodin cotton

(C) TNT

(D) Slurry

Correct Answer

(C) TNT

[#287] The high voltage cables from surface to the substation near the pit bottom carries through . . . . . . . .

(A) DC shaft

(B) UC shaft

(C) Auxiliary shaft

(D) Air shaft

Correct Answer

(A) DC shaft

[#288] When contra rotating fan reversed, the fan produces nearly . . . . . . . .% of normal air quantity.

(A) 40

(B) 50

(C) 60

(D) 70

Correct Answer

(C) 60

[#289] Thin seam the thickness of coal less than . . . . . . . .

(A) 1.2 m

(B) 1.5 m

(C) 1.8 m

(D) 2 m

Correct Answer

(B) 1.5 m

[#290] Self contained breathing apparatus is a . . . . . . . . type apparatus.

(A) Open circuit

(B) Closed circuit

(C) Semi closed circuit

(D) All of these

Correct Answer

(B) Closed circuit