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Q. |
The heat transfer by radiation from a mild steel surface is to be reduced by reducing the emissivity of the surface. This can be best achieved by |
A. | Painting the surface black |
B. | Painting the surface white (with aluminium paint) |
C. | Giving the surface a mirror finish |
D. | Roughening the surface |
Answer» B. Painting the surface white (with aluminium paint) |
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