Drilling And Blasting - Study Mode
[#241] Upper limit of methane air mixture.
Correct Answer
(D) 14.8
[#242] The relation between pressure, resistance and quanity is expressed by the formula.
Correct Answer
(C) P = RQ 2
[#243] The amount of innert dust required to be mixed with the coal dust to make it non inflammable called
Correct Answer
(C) Explosibility index
[#244] The breathing bag capacity of BG 174 . . . . . . . . in litres.
Correct Answer
(D) 6
[#245] The ratio between the effective w.g and the theoritical w.g produced by fan with same dimensions and running at the same speed called . . . . . . . .
Correct Answer
(C) Manometric efficiency