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Heat Transfer

Heat Transfer
Maximum heat transfer rate is achieved in __________ flow.

Turbulent
Co-current
Laminar
Counter-current

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Heat Transfer
__________ equation relates the thermal conductivity of a solid to its temperature.

Lee's
Kopp's
Antonie
Kistyakowski

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Heat Transfer
Rate of crystallisation does not depend upon the

None of these
Turbulence within the solution
Number and active surface area of the crystals
Extent of supersaturation

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Heat Transfer
The film thickness for laminar film condensation on vertical surface __________ from top to bottom.

Remains constant
Cummulatively increases
And the surface conductance increase
Cummulatively decreases

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Heat Transfer
For concentrating an aqueous solution of a material like anhydrous Na₂SO₄, whose solubility decreases with rise in temperature, the most suitable evaporator is a __________ evaporator.

Vacuum
Backward feed
High pressure
None of these

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Heat Transfer
A metal wire of 0.01 m dia and thermal conductivity 200 W/m.K is exposed to a fluid stream with a convective heat transfer coefficient of 100 W/m².K. The Biot number is

0.0035
0.025
5.6
3.5

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