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Heat Transfer

Heat Transfer
In SI units, thermal conductivity is expressed in

Watt/m². °K
Watt/m². °K
Watt/m.°K
Watt/m4. °K

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Heat Transfer
Analogy between mass and heat transfer is not applicable in case of

Viscous heating or chemical reaction
Thermal or pressure mass diffusion
Both B and C
Same velocity profile or equal eddy diffusivities

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Heat Transfer
In thermal radiation for a black body (where, ε is emissivity and α is absorptivity)

α ≠ 1, ε = 1
α = 1; ε = 1
α = 1; ε ≠ 1
α ≠ 1, ε ≠ 1

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Heat Transfer
Prandtl and Reynold's analogies are identical for Prandtl number value of

1
5
0.5

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Heat Transfer
The thickness of condensate layer in filmwise condensation depends on the

Surface configuration
All of these
Condensation rate
Liquid flow rate from the surface

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Heat Transfer
Radiant energy received by a body is proportional to (where, d = the distance between the object emitting radiation and that receiving it.)

d2
d
√d
d1.5

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MORE MCQ ON Heat Transfer

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