Heat is loss from a 100 mm diameter steam pipe placed horizontally in ambient ai

Question

Heat is loss from a 100 mm diameter steam pipe placed horizontally in ambient air at 30 degree Celsius. If the Nusselt number is 25 W/m² K and thermal conductivity of the air is 0.03 W/m K, then heat transfer coefficient will be

Options:

A . 7.5 W/m² K

B . 16.5 W/m² K

C . 25 W/m² K

D . 30 W/m² K

Answer: Option A
Answer: (a).7.5 W/m² K

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