Hamad Furnace Technology 30/09/2020 A. 95% N2 + 5% H2 B. 5% H2 + 9% N2 C. 100% CO D. 100% H2 Related Mcqs: In salt bath furnace, heat is transferred to the charge mainly by __________________?A. Conduction B. Convection C. Radiation D. None of these... Combustion of furnace oil in a furnace (soaking pit) with preheated combustion air at 400°C results in saving of about __________ percent furnace oil as compared to its combustion with atmospheric air, if the flue gas outlet temperature from the soaking pit is 1200°C ?A. 5 B. 60 C. 20 D. 40... The rate of scaling of furnace stock depends upon the_________________?A. Temperature B. Time C. Nature of atmosphere D. All A., B. and C.... Temperature of a furnace fired with low calorific value fuel gas (i.e. lean gas) can be increased by______________________?A. Preheating the combustion air B. Oxygen enrichment of combustion air C. Preheating the fuel gas D. All A., B. & C.... To reduce the stack loss, heat recovery from flue gas can be done by_____________________?A. Preheating of cold stock B. Preheating of combustion air C. Steam generation in waste heat boilers D. All A., B. and C....
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