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Heat Transfer

Heat Transfer
Peclet number (Pe) is given by

Pe = Re.Pr
Pe = Re/Pr
Pe = Pr/Re
Pe = Nu.Re

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Heat Transfer
The rate of heat transfer is a product of overall heat transfer co-efficient, the difference in temperature and the

Heating volume
None of these
Nusselt number
Heat transfer area

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Heat Transfer
For a fluid flowing in an annulus space, the wetted perimeter for heat transfer and pressure drop are

Linearly related
Same
Never different
Different

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Heat Transfer
Graetz number is given by

kL/mCp
mCp/kL
kμ/mCp
mCp/kμ

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

smaller than
equal to
greater than
None of the listed here

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Heat Transfer
The unit of conductance in SI unit is

W/m
W/m²
W/m°K
W/°K

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