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Temperature of a furnace fired with low calorific value fuel gas (i.e. lean gas) can be increased by | |
A. | preheating the combustion air. [Wrong Answer] |
B. | oxygen enrichment of combustion air. [Wrong Answer] |
C. | preheating the fuel gas. [Wrong Answer] |
D. | all (a), (b) & (c). [Correct Answer] |