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Heat and Mass Transfer

Heat and Mass Transfer
The amount of radiation mainly depends on

Nature of body
Type of surface of body
All of these
Temperature of body

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Heat and Mass Transfer
Joule sec is the unit of

Thermal conductivity
Universal gas constant
Planck's constant
Kinematic viscosity

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

Planck's law
Wien’s law
Stefan's law
Fourier's law

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Heat and Mass Transfer
The process of heat transfer from one particle of the body to another by the actual motion of the heated particles, is called

Radiation
Convection
Conduction
None of these

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Heat and Mass Transfer
In free convection heat transfer transition from laminar to turbulent flow is governed by the critical value of the

Prandtl number, Grashoff's number
Reynold's number, Grashoff's number
Grashoff's number
Reynold's number

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Heat and Mass Transfer
The critical thickness of insulation for a sphere is

h₀/k
k/h₀
h₀/2k
2k/h₀

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