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Heat and Mass Transfer

Heat and Mass Transfer
Unit of thermal conductivity in M.K.S. units is

K cal/kg m² °C
K cal m/hr m² °C
K calm/hr °C
K cal/hr m² °C

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Heat and Mass Transfer
Wien’s law states that the wave length corresponding to ________ is proportional to the absolute temperature.

None of these
Maximum energy
Both (A) and (B)
Minimum energy

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Heat and Mass Transfer
The rate of energy emission from unit surface area through unit solid angle, along a normal to the surface, is known as

Emissivity
Intensity of radiation
Transmissivity
Reflectivity

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Heat and Mass Transfer
The heat is transferred by conduction, convection and radiation in

Condensation of steam in condenser
None of these
Melting of ice
Boiler furnaces

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

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

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Heat and Mass Transfer
The process of heat transfer from one particle of the body to another is called conduction, when the particles of the body

Does not affect the intervening medium
Move actually
Affect the intervening medium
Do not move actually

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