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?
Correct answer: C. In between 37 & 71%
- A. 71%
- B. None of these
- C. In between 37 & 71%
Explanation
An explosion-limit range gives the concentrations between the lower and upper flammability limits at which combustion can propagate. Thus blast-furnace gas is explosive when its concentration lies between 37% and 71% in the gas-air mixture.
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