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Heat Transfer

Heat Transfer
The equation, Nst = f/2, is the __________ analogy.

Prandtl
None of these
Reynolds
Colburn

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

Same
Never different
Different
Linearly related

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Heat Transfer
Dropwise condensation is promoted on a/an __________ surface.

Glazed
Oily
Smooth
Coated

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Heat Transfer
Out of 100 kcal/second of incident radiant energy on the surface of a thermally transparent body, 300 kcal/second is reflected back. If the transmissivity of the body is 0.25, the emissivity of the surface will be

0.85
0.35
0.45
0.55

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Heat Transfer
In case of heat flow by conduction for a cylindrical body with an internal heat source, the nature of temperature distribution is

None of these
Linear
Hyperbolic
Parabolic

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Heat Transfer
Which is the most suitable for cold viscous feed?

Backward feed
Parallel feed
Mixed feed
Forward feed

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