For every 5% black damp corresponding to . . . . . . . .% of reduction in the O2 percentage.
A. 1
B. 2
C. 3
D. 4
Answer: Option A
This Question Belongs to Mining Engineering >> Mine Ventilation
Related Questions on Mine Ventilation
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
A. Water vapour
B. Nitrous fumes
C. Carbon monoxide
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