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Heat Transfer, Refrigeration and Air Conditioning
A steam pipe is to be lined with two layers of insulating materials of different thermal conductivities. For the minimum heat transfer,
the better insulation must be put inside
the better insulation must be put outside
one could place either insulation on either side
one should take into account the steam temperature before deciding as to which insulation is put where
Correct Answer:
the better insulation must be put inside
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