Explosion limit of blast furnace gas is 37 to 71% gas in gas-air mixtu – McqOptions

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1.	Explosion limit of blast furnace gas is 37 to 71% gas in gas-air mixture. It means that the blast furnace gas will explode when burnt in a confined space, if its concentration in the gas-air mixture is __________ percent.
A.	< 37%
B.	>71%
C.	in between 37 & 71%
D.	none of these
Answer» D. none of these

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