The Surface Temperatures of a Flat Wall Are 650°C and 450°C

question 17

Multiple Choice

The surface temperatures of a flat wall are 650°C and 450°C respectively and the thermal conductivity of the wall material is 0.30 kcal/m-hr-°C. The heat flux for a wall of 20 cm thickness will be

• A)60 kcal/m²-hr
• B)600 kcal/m²-hr
• C)120 kcal/m²-hr
• D)300 kcal/m²-hr
• E)450 kcal/m²-hr

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