Leakage of intake to return at . . . . . . . .
A. stopings
B. doors
C. crossings
D. air locks
E. all these
Answer: Option E
This Question Belongs to Mining Engineering >> Mine Ventilation
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The mechanical mixture of gases existing in a mine given off after explosion called
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B. Stink damp
C. Black damp
D. After damp
A Drager Gas Mask does not filter
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B. Nitrous fumes
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