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Q. |
The interchange factor for radiation heat transfer from surface 'x' to surface 'y' in case of an infinite parallel planes with emissivities εx & εy is given by |
A. | εx + εy |
B. | εx . εy |
C. | 1/εx + 1/εy |
D. | (εx + εy)/( εx + εy - εx . εy) |
Answer» D. (εx + εy)/( εx + εy - εx . εy) |
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