engineering recuitment HAL Management & Design Trainee Mock Test 2023 Heat Transfer Conduction Critical Thickness of Insulation
For a current-carrying wire of 20 mm diameter exposed to air (h = 20 W/m2K), maximum heat distribution occurs when the thickness of insulation (k = 0.5 W/mK) is
1
20 mm
2
10 mm
3
2.5 mm
4
None of the above