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Heat and Mass Transfer

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 thermal diffusivities for solids are generally

More than those for liquids and gases
Less than those for liquids
Less than those for gases
More or less same as for liquids and gases

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Heat and Mass Transfer
The critical temperature is the temperature

Below which a gas is always liquefied
Above which a gas may explode
Above which a gas will never liquefied
Below which a gas does not obey gas laws

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Heat and Mass Transfer
Thermal conductivity of glass wool varies from sample to sample because of variation in

All of these
Density
Composition
Porosity

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Heat and Mass Transfer
The thermal diffusivities for gases are generally

More than those for liquids
More than those for solids
Less than those for liquids
Dependent on the viscosity

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Heat and Mass Transfer
The energy distribution of an ideal reflector at higher temperatures is largely in the range of

Shorter wavelength
Longer wavelength
Remain same at all wavelengths
Wavelength has nothing to do with it

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MORE MCQ ON Heat and Mass Transfer

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