A wire of 8 mm diameter at a temperature of 60°C is to be insulted by a material having k = 0.174 W/mK. The heat transfer coefficient on the outside ha = 8 W/m2 K and ambient temperature Ta = 25°C. The maximum thickness of insulation for maximum heat loss will be

A wire of 8 mm diameter at a temperature of 60°C is to be insulted by

1.	A wire of 8 mm diameter at a temperature of 60°C is to be insulted by a material having k = 0.174 W/mK. The heat transfer coefficient on the outside ha = 8 W/m2 K and ambient temperature Ta = 25°C. The maximum thickness of insulation for maximum heat loss will be
A.	15.25 mm
B.	16.50 mm
C.	17.75 mm
D.	18.25 mm
Answer» D. 18.25 mm

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A wire of 8 mm diameter at a temperature of 60°C is to be insulted by a material having k = 0.174 W/mK. The heat transfer coefficient on the outside ha = 8 W/m2 K and ambient temperature Ta = 25°C. The maximum thickness of insulation for maximum heat loss will be

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