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Heat Transfer

Heat Transfer
Reynold's analogy states that

NNu α f
NRe α f
Nst α f
Nst α NRe

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Heat Transfer
Solid angle subtended by the finite surface at the radiating element is

called the angle of vision
expressed in terms of radians
proportional to the square of the distance between surfaces
called the view factor.

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Heat Transfer
The equivalent diameter for pressure drop is __________ that for heat transfer

greater than
equal to
None of the listed here
smaller than

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Heat Transfer
In SI units, thermal conductivity is expressed in

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

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Heat Transfer
Which of the following is directly concerned with the heat transfer?

Sherwood number
Grashoff number
Euler number
Strouhal number

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Heat Transfer
For __________ Prandtl number values, the heat conduction will be negligible in the buffer zone.

Low
High
No
Extremely low

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