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Heat and Mass Transfer

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

Grashoff number
Prandtl number
Biot number
Stanton number

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Heat and Mass Transfer
According to Newton's law of cooling, the heat transfer from a hot body to a cold body is

Directly proportional to the surface area
Directly proportional to the difference of temperatures between the two bodies
Both (A) and (B)
Either (A) or (B)

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Heat and Mass Transfer
Thermal conductivity of solid metals with rise in temperature normally

Decreases
Increases
May increase or decrease depending on temperature
Remain constant

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Heat and Mass Transfer
Which of the following has least value of conductivity?

Water
Air
Plastic
Glass

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Heat and Mass Transfer
In free convection heat transfer, Nusselt number is function of

Grashoff number, Prandtl number and Reynold number
Grashoff number and Prandtl number
Prandtl number and Reynold number
Grashoff number and Reynold number

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

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

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MORE MCQ ON Heat and Mass Transfer

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