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Heat Transfer

Heat Transfer
jH factor for heat transfer depends upon the __________ number.

Reynolds
Biot
Prandtl
Nusselt

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Heat Transfer
One kilogram of water at 0°C is changed to superheated steam of one atm pressure and 300° C. The major heat consumption in the process will be to

Heat the water from 0°C to 100°C
To superheat the steam
Data insufficient, can
Evaporate the water

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Heat Transfer
For shell and tube heat exchanger, with increasing heat transfer area, the purchased cost per unit heat transfer area

Increases
Decreases
Passes through a maxima
Remains constant

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Heat Transfer
Heat exchanger tubes are never made of

Copper
Lead
Stainless steel
Plain carbon steel

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Heat Transfer
Steady state one dimensional heat flow by conduction as given by Fourier's low does not assume that

Boundary surfaces are isothermal
There is no internal heat generation
Material is anisotropic
Constant temperature gradient exists

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

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

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