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Ram Sharma • 193.88K Points
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Q. The inner wall of a furnace is at a temperature of 700°C. The composite wall is made of two substances, 10 and 20 cm thick with thermal conductivities of 0.05 and 0.1 W.m-1.°C-1 respectively. The ambient air is at 30°C and the heat transfer co-efficient between the outer surface of wall and air is 20 W.m-2.°C-1. The rate of heat loss from the outer surface in W.m-2 is

  • (A) 165.4
  • (B) 167.5
  • (C) 172.5
  • (D) 175
  • Correct Answer - Option(A)
  • Views: 891
  • Filed under category Heat Transfer
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