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Heat and Mass Transfer

Heat and Mass Transfer
Planck’s law holds good for

All of these
polished bodies
black bodies
all coloured bodies

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

Convection
Conduction and radiation combined
Conduction
Radiation

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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 due to difference of density caused by temperature of the particle is known as

Radiation
Forced convection
Free convection
Conduction

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Heat and Mass Transfer
A grey body is one whose absorptivity

Varies with wavelength of the incident ray
Varies with temperature
Is equal to its emissivity
Does not vary with temperature and. wavelength of the incident ray

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Heat and Mass Transfer
Thermal conductivity of wood depends on

Temperature
All of these
Density
Moisture

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Heat and Mass Transfer
Thermal conductivity of air at room temperature in kcal/m hr °C is of the order of

0.01
0.1
0.02
0.002

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MORE MCQ ON Heat and Mass Transfer

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