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Heat and Mass Transfer

Heat and Mass Transfer
If the temperature of a solid surface changes form 27°C to 627°C, then its emissive power changes in the ratio of

81
3
270
9

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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

Reflectivity
Transmissivity
Emissivity
Intensity of radiation

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

Grashoff number
Biot number
Prandtl number
Stanton number

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Heat and Mass Transfer
The value of the wave length for maximum emissive power is given by

Planck’s law
Wine’s law
Kirchhoff’s law
Stefan’s law

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

May increase or decrease depending on temperature
Remain constant
Increases
Decreases

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Heat and Mass Transfer
The process of heat transfer from one particle of the fluid to another by the actual movement of the fluid particles caused by some mechanical means, is known as

Free convection
Conduction
Radiation
Forced convection

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MORE MCQ ON Heat and Mass Transfer

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