Mining Engineering > GATE 2020 > Mine Environment
A sealed-off area air sample consists of 16.0% O2 3.0% CO2 and the rest is N2. Assume that the standard composition of atmospheric air is 21.0% O2 and 79.0% N2 The percentage of blackdamp in the air sample is ___________. (round off to 2 decimal places).

Correct : 22.00

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air composition percentage blackdamp percentage GATE Mining Engineering 2020 air sample composition atmospheric air composition GATE 2020 question percentage blackdamp mining engineering gate

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