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Heat Transfer

Heat Transfer
Correction is applied to LMTD for __________ flow.

Counter
None of these
Cross
Parallel

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Heat Transfer
In Biot number, the characteristic length used is the ratio of the __________ of the solid.

Surface area to volume
Surface area to perimeter
Volume to surface area
Perimeter to surface area

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Heat Transfer
Steam side heat transfer co-efficient in an evaporator is in the range of __________ kcal/hr.m²°C.

18537
100-500
5000-15000
1000-1500

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Heat Transfer
Open pan evaporators are preferred to be used, when the solution to be concentrated is

Highly viscous
Scaling
Salty
Corrosive

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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
120 to 400
0.6 to 120

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

square root of
twice
none of the listed here
four times

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