To what extent must the oxygen content be reduced before an explosion of methane and air is impossible?
Correct Answer: 12 percent
Description: For a mixture of strictly methane and air, the oxygen content must be 12 percent or less.
It is however, significant to note that there is a combination of combustible gases following explosions and during fires.
So the maximum allowable oxygen will vary according to variations in the combustible and inert gases.
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