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Heat Transfer

Heat Transfer
The range of electromagnetic spectrum important in heat transfer by radiation is __________ microns.

0.38-0.78
0.5-50
5-50
100-1000

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Heat Transfer
Fourier's law applies to the heat transfer by

None of the listed here
conduction
convection
radiation

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Heat Transfer
According to Reynolds analogy, Stanton number is equal to (where, f = Fanning friction factor)

f/4
f
2f
f/2

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Heat Transfer
Which of the following has maximum thermal conductivity?

Coal
Tar
Iron
Nitrogen

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Heat Transfer
Reason for operating an evaporator in multiple effect is to secure

Increased capacity
Increased steam economy
Both A and B
Decreased steam consumption

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Heat Transfer
Nusselt number is a function of Prandtl number and __________ number of fluid in natural convection heat transfer.

Grashoff
Biot
Reynolds
Stantan

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