The overall heat transfer coefficient due to convection and radiation – McqOptions

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1.	The overall heat transfer coefficient due to convection and radiation for a steam maintained at 200°C running in a large room at 30°C is 17.95 W/m2K. If the emissivity of the pipe surface is 0.8; the value of σ = 5.67 × 10 - 8 W/m2K4; the heat transfer coefficient due to radiation will be nearly
A.	17 W/m2K
B.	14 W/m2K
C.	11 W/m2K
D.	8 W/m2K
Answer» D. 8 W/m2K

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