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Heat Transfer

Heat Transfer
Heat flux is the time rate of heat transfer per unit

area
none of the listed here
length
volume

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Heat Transfer
Thickness of thermal boundary layer is more compared to that of hydrodynamic boundary layer, when the value of Prandtl number is

> 5
> 1
< 1
1

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Heat Transfer
Nucleate boiling is promoted

On rough surfaces
In the absence of agitation
On polished surfaces
None of these

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Heat Transfer
The value of Stefan-Boltazman constant in SI unit is

0.1714 x 10-8W/m².°K4
5.6697 x 10-8kcal/m² . °K4
5.6697 x 10-8W/m².°K4
0.1714 x 10-8kcal/m². °K4

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Heat Transfer
The range of electromagnetic spectrum important in heat transfer by radiation is __________ microns.

0.38-0.78
5-50
0.5-50
100-1000

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Heat Transfer
Film boiling occurs at __________ pressure.

none of the listed here
very high
negative
atmospheric

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MORE MCQ ON Heat Transfer

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