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Heat Transfer

Heat Transfer
For what value of Prandtl number, St = f/2?

2
> 1
1
1.5

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Heat Transfer
At what value of Prandtl number, conduction is negligible in the turbulent core of a fluid flowing through a heated pipe?

< 0.1
> 0.6
0.5
< 0.5

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Heat Transfer
Film boiling occurs at __________ pressure.

none of the listed here
negative
very high
atmospheric

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Heat Transfer
In a shell and tube heat exchanger, floating head is used for

Less corrosion of tubes
High heat transfer co-efficient
Low pressure drop
Large temperature differentials

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Heat Transfer
The ratio of the total emissive power to the absorptivity for all bodies is same at ther-mal equilibrium. This is __________ law.

Wien's displacement
Stefan-Boltzman
Planck's
Kirchoffs

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Heat Transfer
'Duhring's plot' is of use in

Extractive distillation
Leaching
Absorption
Evaporation

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MORE MCQ ON Heat Transfer

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