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Heat and Mass Transfer

Heat and Mass Transfer
The heat of sun reaches to us according to

Radiation
Convection
None of these
Conduction

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Heat and Mass Transfer
Thermal diffusivity is

Function of temperature
A physical property of the material
Used as mathematical model
A dimensionless parameter

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Heat and Mass Transfer
The concept of overall coefficient of heat transfer is used in case of heat transfer by

Conduction and convection
Conduction
Convection
Radiation

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Heat and Mass Transfer
The concept of overall coefficient of heat transfer is used in heat transfer problems of

Radiation
Convection
Conduction
Conduction and convection

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Heat and Mass Transfer
The product of Reynolds number and Prandtl number is known as

Biot number
Grashoff number
Stanton number
Peclet number

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Heat and Mass Transfer
Thermal conductivity of non-metallic amorphous solids with decrease in temperature

Increases
Remain constant
May increase or decrease depending on temperature
Decreases

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