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In a recuperative air preheater, the heat is transferred | |
A. | from a metal wall from one medium to another [Correct Answer] |
B. | from heating an itermediate material and then heating the air from this material [Wrong Answer] |
C. | by direct mixing , [Wrong Answer] |
D. | heat is transferred by bleeding some gases from furnace [Wrong Answer] |
E. | none of the above. [Wrong Answer] |