_ In recuperative air preheaters, the heat is transferred$? – McqOptions

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1.	_ In recuperative air preheaters, the heat is transferred$?
A.	From a metal wall from one medium to another
B.	From heating an intermediate material and then heating the air from this material
C.	By direct mixing
D.	Heat is transferred by bleeding some gases from furnace
Answer» B. From heating an intermediate material and then heating the air from this material

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