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Question
Temperature of a furnace fired with low calorific value fuel gas (i.e. lean gas) can be increased by______________________?
Options:
A .  Preheating the combustion air
B .  Oxygen enrichment of combustion air
C .  Preheating the fuel gas
D .  All A., B. & C.
Answer: Option D
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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