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Furnace technology
Note:- You can add tough questions into your favourite list for second revision. |
The thermal efficiency of an air/fuel gas preheating recuperator may be as high as __________ percent. | |
A. | 50 [Wrong Answer] |
B. | 65 [Wrong Answer] |
C. | 85 [Correct Answer] |
D. | 99 [Wrong Answer] |
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