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Heat and Mass Transfer

Heat and Mass Transfer
Stefan Boltzmann law is applicable for heat transfer by

Conduction and radiation combined
Convection
Radiation
Conduction

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Heat and Mass Transfer
Heat is transferred by all three modes of transfer, viz. conduction, convection and radiation in

Refrigerator condenser coils
Electric heater
Steam condenser
Boiler

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Heat and Mass Transfer
Fourier's law of heat conduction is valid for

One dimensional cases only
Regular surfaces having non-uniform temperature gradients
Three dimensional cases only
Two dimensional cases only

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Heat and Mass Transfer
The ratio of surface convection resistance to the internal conduction resistance is known as

Prandtl number
Stanton number
Grashoff number
Biot number

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Heat and Mass Transfer
According to Stefan Boltzmann law, ideal radiators emit radiant energy at a rate proportional to

Fourth power of temperature
Fourth power of absolute temperature
Square of temperature
Absolute temperature

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Heat and Mass Transfer
The rate of energy emission from unit surface area through unit solid angle, along a normal to the surface, is known as

Intensity of radiation
Emissivity
Reflectivity
Transmissivity

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MORE MCQ ON Heat and Mass Transfer

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