Heat transfer in a long, hollow cylinder which is maintained at uniform but different temperatures on its inner and outer surfaces may be assumed to be taking place in which direction?

Heat transfer in a long, hollow cylinder which is maintained at unifor

1.	Heat transfer in a long, hollow cylinder which is maintained at uniform but different temperatures on its inner and outer surfaces may be assumed to be taking place in which direction?
A.	Axial only
B.	Unpredictable
C.	Radial only
D.	No heat transfer takes place
Answer» D. No heat transfer takes place