Mining Engineering > GATE 2024 > Mine Environment
The data obtained from an air sample analysis of an old working in a coal mine are given.
O2 17.15%, CO2 3.40%, CH4 2.20%, and N2 77.25%.
Considering atmospheric air contains
O2 20.95%, CO2 0.03%, and N2 79.02%,
the percentage of blackdamp in the old working, is ________. (round off up to 2 decimals)
O2 17.15%, CO2 3.40%, CH4 2.20%, and N2 77.25%.
Considering atmospheric air contains
O2 20.95%, CO2 0.03%, and N2 79.02%,
the percentage of blackdamp in the old working, is ________. (round off up to 2 decimals)
Correct : 15.80
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