A steam pipe is to be insulated by two insulating materials put over each other. For best results

A steam pipe is to be insulated by two insulating materials put over each other. For best results Correct Answer Better insulation should be put over pipe and better one over it

We should select a material which have low heat transfer capacity. So we should select a material which thermal conductivity is low. So that heat will pass through material is minimum. We should use low thermal conductivity material both side because after all we need to decrease the rate of heat transfer.
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