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Heat and Mass Transfer

Heat and Mass Transfer
Heat transfer by radiation mainly depends upon

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

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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
An ordinary passenger aircraft requires a cooling system of capacity.

2 TR
4 TR
10 TR
8 TR

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Heat and Mass Transfer
The rate of heat flow through a body is Q = [kA (T₁ - T₂)]/x. The term x/kA is known as

None of these
Thermal coefficient
Thermal resistance
Thermal conductivity

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Heat and Mass Transfer
Thermal diffusivity of a substance is given by (where h = Thermal diffusivity, ρ = Density of substance, S = Specific heat, and k = Thermal conductivity)

h = kρ/S
h = k/ ρS
h = S/ρk
h = ρS/k

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Heat and Mass Transfer
Heat transfer takes place as per

First law of thermodynamic
Zeroth law of thermodynamics
Second law of the thermodynamics
Kirchoff's law

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MORE MCQ ON Heat and Mass Transfer

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