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Heat and Mass Transfer

Heat and Mass Transfer
The amount of radiation mainly depends on

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

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Heat and Mass Transfer
Sensible heat factor is given by (where S.H. = Sensible heat, and L.H. = Latent heat)

(S.H + L.H) /S.H
(L.H - S.H)/S.H
S.H/(S.H + L.H)
S.H/(L.H - S.H)

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

Porosity
Density
All of these
Composition

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Heat and Mass Transfer
According to Dalton's law of partial pressures, (where pb = Barometric pressure, pa = Partial pressure of dry air, and pv = Partial pressure of water vapour)

Pb = pa + pv
Pb = pa - pv
Pb = pa/pv
Pb = pa × pv

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Heat and Mass Transfer
Thermal diffusivity is

A physical property of the material
Used as mathematical model
A dimensionless parameter
Function of temperature

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Heat and Mass Transfer
When heat is transferred by molecular collision, it is referred to as heat transfer by

Convection
Radiation
Scattering
Conduction

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MORE MCQ ON Heat and Mass Transfer

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