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More Mining Engineering Questions
The exhaust air, below ground, which contains dust in excess of the permissible limit shall be efficiently diluted and if necessary filtered. So as to reduce the concentration of respirable dust there in below . . . . . . . . percent of the permissible limit before being recirculated into working place.
A person inhales . . . . . . . . 1/min, the O 2 consumption . . . . . . . . 1/min, when doing hard work in pauses.
Walking drag line have a travelling speed of . . . . . . . .
The delay interval in short delay detonator is
Jack hammer drill also called . . . . . . . .