A .  1 kcal/hr.m.0C is equal to 1 BTU/hr. ft.0F.
B .  n steady state heat conduction, the only property of the substance which determines the temperature distribution, is the thermal conductivity.
C .  In unsteady state heat conduction, heat flows in the direction of temperature rise.
D .  In heat transfer by forced convection, Grashoff number is very important.
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