Furnace oil consumption in a furnace for a given duty employing prehea – McqOptions

MCQOPTIONS

1.	Furnace oil consumption in a furnace for a given duty employing preheated combination air (at 300° ) may be reduced by about __________ percent as compared to the use of atmospheric combustion air.
A.	5
B.	10
C.	20
D.	35
Answer» D. 35

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