Which is the most thermally efficient furnace _______________________?
Correct answer: C. Boiler furnace
- A. Reheating furnace
- B. Reverberatory furnace
- C. Boiler furnace
- D. Rotary kilns
Explanation
A boiler furnace is thermally efficient because heat released by combustion is transferred directly to boiler water, while the steam-generation system also permits effective recovery of flue-gas heat. Reheating, reverberatory, and rotary-kiln furnaces generally lose more heat with hot exhaust gases and furnace walls.
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