A reduction in thermal resistance during heat transfer does not occur

1.	A reduction in thermal resistance during heat transfer does not occur in the___________________?
A.	Convection heat transfer by stirring the fluid and cleaning the heating surface
B.	Conduction heat transfer by reduction in the material thickness and increase in the thermal conductivity
C.	Radiation heat transfer by increasing the temperature and reducing the emissivity
D.	None of these
Answer» D. None of these

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A reduction in thermal resistance during heat transfer does not occur in the___________________?

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