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Mining Engineering · Q103

Mine Ventilation

Engineering and GATE · Mining Engineering · question 103

Q103

An air sample taken from the return airway of a district contains the following gases. The Graham's ratio for the district is Gas CO2 H4 O2 N2 CO Concentration % 0.4 1.17 19.92 78.49 0.02

An air sample taken from the return airway of a district contains the following gases. The Graham's ratio for the district is
Gas CO2 H4 O2 N2 CO
Concentration % 0.4 1.17 19.92 78.49 0.02
A.
5.6
B.
4.8
C.
3.0
D.
2.3
Answer

Answer: Option D

Solution

Answer: Option D
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