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Heat Transfer

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

Salty
Corrosive
Highly viscous
Scaling

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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

none of the listed here
four times
twice
square root of

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Heat Transfer
A BTU/hr.ft.2 °F is equal to

1 kcal/hr. m².°K
None of these
1 kcal/hr. m²°C
4.88 kcal/hr. m.2°C

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

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

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Heat Transfer
What is the steam economy in case of a single effect evaporator system?

< 1
>1
1
0.1

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Heat Transfer
Unsteady state heat conduction occurs, when

Three dimensional heat flow is concerned
Temperature distribution is dependent on time
Temperature distribution is independent of time
Heat flows in one direction only

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