Q.

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
Answer» D. 300 kcal/m2-hr
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