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Heat Transfer

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

1
> 5
< 1
> 1

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Heat Transfer
'Fouling factor' used in the design of a multipass shell and tube heat exchanger is a

Factor of safety
Conversion factor for individual film heat transfer co-efficient to overall heat transfer co-efficient
Non-dimensional factor
None of these

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Heat Transfer
In a forward feed multiple effect evaporator unit

No pump is required to withdraw the product from the last effect
Transfer from effect to effect is done by pumps
None of these
Viscosity of liquid is highest in first effect

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

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

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Heat Transfer
In SI units, thermal conductivity is expressed in

Watt/m². °K
Watt/m². °K
Watt/m4. °K
Watt/m.°K

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Heat Transfer
Nusselt number (for forced convection heat transfer) is a function of the __________ number.

Prandtl
Both Reynolds & Prandtl
None of the listed here
Reynolds

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MORE MCQ ON Heat Transfer

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