engineering recuitment AAI JE Technical Mock Test 2020-21 Heat Transfer Conduction Critical Thickness of Insulation
A 10 mm diameter electrical conductor is covered by an insulation of 2 mm thickness. The conductivity of the insulation is 0.08 W/m-K and the convection coefficient at the insulation surface is 10 W/m2-K. Addition of further insulation of the same material will
1
increase heat loss continuously
2
decrease heat loss continuously
3
increase heat loss to a maximum and then decrease heat loss
4
decrease heat loss to a minimum and then increase heat loss