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Heat Transfer

Heat Transfer
Viscous & heat sensitive liquids are concentrated in __________ evaporators.

None of these
Agitated film
Long tube
Open pan

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Heat Transfer
Stefen's block body radiation law can also be derived from __________ law.

Fourier's
Planck's
None of these
Kirchoffs

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Heat Transfer
Pick out the correct equation.

JH = (St)(Pr)1/3 = f/2
JH = (St)(Pr)2/3 = f/2
JH = (St)2/3(Pr) = f/2
JH = (St)1/3(Pr) = f/2

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Heat Transfer
In a shell and tube heat exchanger, putting a longitudinal baffle across the shell, forces the shell side fluid to pass __________ through the heat exchanger.

Once
Four times
Thrice
Twice

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Heat Transfer
A 2-4 heat exchanger involves

Both counter and parallel-flow of the fluids
Only parallel-flow of fluids
Only counter-flow of fluids
Smaller pressure drop compared to 1-2 exchanger

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Heat Transfer
In case of a multipass shell and tube heat exchanger, providing a baffle on the shell side __________ the heat transfer rate.

Does not affect
May increase or decrease, depends on the type of baffle
Increases
Decreases

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