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Heat Transfer

Heat Transfer
For what value of Prandtl number, the Col-burn analogy is valid ?

0.06 to 120
0.6 to 120
1 to 103
l to 50

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Heat Transfer
For evaporation of viscous solution in a multiple effect evaporator, the prefered feeding scheme is

Backward
None of these
Parallel
Forward

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Heat Transfer
Steady state one dimensional heat flow by conduction as given by Fourier's low does not assume that

Material is anisotropic
There is no internal heat generation
Constant temperature gradient exists
Boundary surfaces are isothermal

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Heat Transfer
Heat transfer by conduction in the turbulent core of a fluid flowing through a heated pipe is negligible, if the value of Prandtl number is

0.6
0.4
0.8
0.2

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Heat Transfer
For a fluid flowing in an annulus space, the wetted perimeter for heat transfer and pressure drop are

Never different
Different
Same
Linearly related

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Heat Transfer
Analogy between mass and heat transfer is not applicable in case of

Thermal or pressure mass diffusion
Viscous heating or chemical reaction
Both B and C
Same velocity profile or equal eddy diffusivities

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