Drilling And Blasting - Study Mode
[#96] Explosive mixture of gasses is one, which when once ignited, will allow the flame to be self propagated through out the mixture, independent and away from source of ignition called . . . . . . . .
Correct Answer
(B) Inflammable mixture
[#97] Static gauge pressure at the inlet of any duct is
Correct Answer
(D) Positive for forcing and negative for exhausting
[#98] Surface screening plant and tipplers should be at least . . . . . . . . away from the intake shaft.
Correct Answer
(C) 40
[#99] Simplified form of gas mask is
Correct Answer
(D) Self rescue
[#100] Air velocities in main haulage roads be . . . . . . . . m/sec.
Correct Answer
(A) 5