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Heat and Mass Transfer

Heat and Mass Transfer
The unit of Stefan Boltzmann constant is

watt/cm2 °K⁴
watt/cm4 °K
watt2/cm °K⁴
watt/cm3 °K

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Heat and Mass Transfer
Thermal conductivity of water _________ with rise in temperature.

Remain same
Decreases
Increases
May increase or decrease depending upon temperature

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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
Conduction
Radiation
Convection

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Heat and Mass Transfer
The ratio of Nusselt number and the product of Reynold's number and Prandtl number is equal to

Grashoff number
Stanton number
Peclet number
Biot number

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Heat and Mass Transfer
The ratio of the emissive power and absorptive power of all bodies is the same and is equal to the emissive power of a perfectly black body. This statement is known as

Stefan's law
Kirchhoff's law
Wien's law
Planck's law

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Heat and Mass Transfer
The transfer of heat by molecular collision is known as

Radiation
None of these
Convection
Conduction

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MORE MCQ ON Heat and Mass Transfer

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