Drilling And Blasting - Study Mode

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[#821] It is a sudden combustion process of great intensity accompanied by release of large quantities of heat energy and in which original gas or solid substance converted instantaniously in to gasious products . . . . . . . .

(A) Explosive

(B) Explosion

(C) Detonation

(D) Out burst

Correct Answer

(B) Explosion

[#822] A mixture of maganese dioxide and copper oxide called

(A) Hopacalite

(B) Gasolite

(C) Nomex

(D) None

Correct Answer

(A) Hopacalite

[#823] Dipping connection in the are body joining two levels in metal mine.

(A) H/W

(B) Rise

(C) Winze

(D) Top

Correct Answer

(C) Winze

[#824] The ventilation of drives exceeding 50 m length to be such as to dilute the nitrous fumes produced by blasting to . . . . . . . . and CO to . . . . . . . . within a period of . . . . . . . . min in long tunnel.

(A) 5 ppm, 50 ppm, 5

(B) 1 ppm, 25 ppm, 10

(C) 10 ppm, 40 ppm, 2

(D) 5 ppm, 40 ppm, 5

Correct Answer

(A) 5 ppm, 50 ppm, 5

[#825] Prilled ammonium Nitrate of fertilizer grade mixed with diesel oil is used for . . . . . . . . in quarries.

(A) Small diameter holes

(B) Large diameter holes

(C) Medium diameter holes

(D) All of these

Correct Answer

(B) Large diameter holes