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HEAT TRANSFER

Heat Transfer
In a multipass shell and tube heat exchanger, tube side return pressure loss is equal to __________ the velocity head

four times
square root of
twice
none of the listed here

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Heat Transfer
For what value of Prandtl number, the Col-burn analogy is valid ?

l to 50
1 to 103
0.6 to 120
0.06 to 120

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Heat Transfer
In a forward feed multiple effect, the pressure build up will be

highest at the inlet of the last effect
highest at the outlet of the last effect
least at the inlet of the first effect
least at the outlet of the last effect

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Heat Transfer
Film boiling is usually not desired in commercial equipments, because

it is not economic
none of the listed here
it is difficult to maintain
the heat transfer rate is low in view of the large temperature drop. @

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Heat Transfer
Film condensation is promoted on a/an __________ surface.

oily
dirty
coated
clean & smooth

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