engineering recuitment GATE ME 2023-24 Test Series Heat Transfer Conduction Heat Conduction Through Plane and Composite Walls
A 0.625 cm thick plank of wood (k = 0.166 W/mK) floats in a large pool of water. The convective heat transfer coefficients between the top surface of the wood and the air, and between the bottom surface of the wood are 10 and 450 W/m2K respectively. The wood absorbs 470 W/m2 of solar radiation. The temperature of the air is 25°C and that of water is 10°C. Ignore radiation from the wood. The temperature of the bottom and upper surface of the wood is
1
27.66°C and 44.33°C respectively
2
44.33°C and 27.66°C respectively
3
14.27°C and 16.67°C respectively
4
16.67°C and 14.27°C respectively