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Heat Transfer

Heat Transfer
A __________ evaporator employs an annular downtake.

Horizontal
Long tube vertical
Basket type
None of these

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

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

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Heat Transfer
For condensation of pure vapors, if the heat transfer co-efficients in filmwise and drop-wise condensation are respectively hf and hd, then

hf could be greater or smaller than hd
hf = hd
hf > hd
hf < hd

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Heat Transfer
Correction is applied to LMTD for __________ flow.

None of these
Counter
Cross
Parallel

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Heat Transfer
Calburn analogy is applicable for the value of Prandtl number from

0.001 to 1
0.5 to 5
0.6 to 120
120 to 400

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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 pitch
No. of baffles
Tube layout
Tube diameter

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