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Heat Transfer

Heat Transfer
Heat flux, as defined in heat flow is analogous to __________ in electricity flow.

None of these
Resistance
Voltage
Current

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Heat Transfer
Reynold's analogy states that (where, St = Stanton number f = friction factor)

St = 4f
St = f/4
St = f1/2
St = f/2

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Heat Transfer
Graetz number is given by

mCp/kL
kμ/mCp
kL/mCp
mCp/kμ

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Heat Transfer
In a shell and tube heat exchanger, the shell side fluid velocity can not be changed by changing the

Tube diameter
Tube pitch
No. of baffles
Tube layout

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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
Evaporate the water
To superheat the steam
Data insufficient, can

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Heat Transfer
Maximum heat transfer rate is achieved in __________ flow.

Counter-current
Laminar
Co-current
Turbulent

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