The surface temperatures of a flat wall are 650?C and 450?C respective – McqOptions

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1.	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» E. 450 kcal/m2-hr

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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