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Heat Transfer

Heat Transfer
In a single effect evaporator, the economy is

< 1
1
> 1
None of these

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Heat Transfer
In natural convection heat transfer, the correlating parameter is the

Grashoff number
Eckert number
Graetz number
Bond number

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Heat Transfer
Boiling of milk in an open vessel is an example of __________ boiling.

Sub-cooled
None of these
Film
Saturated nucleate

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Heat Transfer
In forced convection, the heat transfer depends on

Re, Gr
Re, Pr
mainly Gr
none of the listed here

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Heat Transfer
Steam condensate is recovered by steam traps and recycled for use as boiler feed water, because of its low

Suspended solids content
Hardness
All of these
Dissolved soilds content

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Heat Transfer
In thermal radiation for a black body (where, ε is emissivity and α is absorptivity)

α ≠ 1, ε ≠ 1
α ≠ 1, ε = 1
α = 1; ε ≠ 1
α = 1; ε = 1

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