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 outside

the better insulation must be put inside

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

A steam pipe is to be lined with two layers of insulating materials of

1.	A steam pipe is to be lined with two layers of insulating materials of different thermal conductivities. For the minimum heat transfer,
A.	the better insulation must be put inside
B.	the better insulation must be put outside
C.	one could place either insulation on either side
D.	one should take into account the steam temperature before deciding as to which insulation is put where
Answer» B. the better insulation must be put outside