engineering recuitment GATE ME 2023-24 Test Series Heat Transfer Conduction Heat Conduction Through Hollow and Composite Cylinders
A stainless steel tube (ks = 19 W/m K) of 2 cm ID and 5 cm OD is insulated with 3 cm thick asbestos (ka = 0.2W/m K). If the temperature difference between the innermost and outermost surfaces is 600° C, the heat transfer rate per unit length is
1
0.94 W/m
2
9.44 W/m
3
944.72 W/m
4
9447.21 W/m