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CSS Solved Papers
Physics Chemistry

Engineering :: Heat Transfer


  A sphere 15 cm in diameter is covered with 5 cm of insulation (k = 0.057 kcal/m-hr-?C). The inside and outside surface temperature of the insulation are 315?C and 80?C respectively. The heat loss per sq. m of the outside surface will be closer to
[A]. 40 kcal/hr[B]. 80 kcal/hr
[C]. 160 kcal/hr[D]. 320 kcal/hr

Answer: Option C


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