Drilling And Blasting - Study Mode

[#546] Capacity of slusher is . . . . . . . . tph.
Correct Answer

(A) 30 - 40

[#547] The type explosives selected for breaking in hard rock and tunnels.
Correct Answer

(C) High density

[#548] The rearrangement of pit bottom layout distroys the strength of . . . . . . . .
Correct Answer

(D) Shaft pillar

[#549] Calculate the wg. produced by 3 m dia fan running at 250 rpm and deliver 6000 m 3 /min of air, if the blades are radial in mm w.g of the blade tip speed is 39.3 m/sec.
Correct Answer

(B) 189.1

[#550] Weight of gas mask . . . . . . . . kg.
Correct Answer

(C) 4