Heat and Mass Transfer
When heat is transferred from hot body to cold body, in a straight line, without affecting the intervening medium, it is referred as heat transfer by

Conduction and convection
Convection
Conduction
Radiation

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Heat and Mass Transfer
Which of the following would lead to a reduction in thermal resistance?

In radiation, increasing the temperature and reducing the emissivity.
All of these
In convection, stirring of the fluid and cleaning the heating surface.
In conduction, reduction in the thickness of the material and an increase in thermal conductivity.

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