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Heat and Mass Transfer

Heat and Mass Transfer
Heat transfer by radiation mainly depends upon

Kind and extent of its surface
Nature of the body
All of these
Its temperature

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Heat and Mass Transfer
The insulation ability of an insulator with the presence of moisture would

Increase
May increase/decrease depending on temperature and thickness of insulation
Decrease
Remain unaffected

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Heat and Mass Transfer
The amount of radiation mainly depends on

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

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Heat and Mass Transfer
Heat is closely related with

Liquids
Energy
Temperature
Entropy

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Heat and Mass Transfer
Absorptivity of a body will be equal to its emissivity

At critical temperature
At all temperatures
At one particular temperature
When system is under thermal equilibrium

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

Decreases
Increases
May increase or decrease depending upon temperature
Remain same

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