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HEAT TRANSFER

Heat Transfer
'Duhring's plot' is of use in

Extractive distillation
Evaporation
Leaching
Absorption

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Heat Transfer
Heat exchangers operating, when the asymptotic range is reached,

Results in making part of the heating surface inactive
Results in abruptly increased velocity
Provide very large heat transfer co-efficient
None of these

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Heat Transfer
In natural convection heat transfer, the correlating parameter is the

Grashoff number
Graetz number
Eckert number
Bond number

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Heat Transfer
Stefen's block body radiation law can also be derived from __________ law.

Kirchoffs
None of these
Fourier's
Planck's

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Heat Transfer
What is the emissivity of a black body?

0.5
1
0.9

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