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Heat Transfer

Heat Transfer
Choose the correct equation.

Nu = (Re) (Pr) (St)
Nu = (Pr)(St)
Nu = (Re)(Pr)
Nu = (Re) (Pr) (Gz)

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Heat Transfer
As the difference between the wall temperature and bulk temperature increases, the boiling heat transfer co-efficient

continues to decrease
goes through a minimum
goes through a maximum.
continues to increase

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Heat Transfer
In a shell and tube heat exchanger, the tube side heat transfer co-efficient just at the entrance of the tube is

None of these
Infinity
Same as average heat transfer co-efficient for tube side
Zero

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Heat Transfer
A graph between __________ is called Wilson plot.

1/v0.8 Vs . U
1/U Vs . 1/V
1/U Vs . 1/v0.8
V0.8 Vs . U

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Heat Transfer
Graetz number is given by

mCp/kμ
mCp/kL
kL/mCp
kμ/mCp

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Heat Transfer
With increase in temperature, the thermal conductivity of a gas

May increase or decrease depending on the type of gas
Decreases
Increases
Remains same

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MORE MCQ ON Heat Transfer

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