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Heat Transfer

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

None of these
Film
Sub-cooled
Saturated nucleate

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Heat Transfer
For turbulent flow in a tube, the heat transfer co-efficient is obtained from the Dittus-Boelter correlation. If the tube diameter is halved and the flow rate is doubled, then the heat transfer co-efficient will change by a factor of

1
1.74
37
6.1

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Heat Transfer
Overall thermal resistance for conductive heat transfer through a series of flat resistances is equal to the

Minimum resistance presents in the series
Maximum resistance in the series
Sum of all resistances
Average of all resistances

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Heat Transfer
__________ equation relates the thermal conductivity of a solid to its temperature.

Antonie
Kopp's
Kistyakowski
Lee's

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Heat Transfer
Baffles are provided in heat exchangers to increase the

Heat transfer rate
Heat transfer area
Fouling factor
Heat transfer co-efficient

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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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