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Heat Transfer

Heat Transfer
The units of resistance to heat transfer is

J.m⁻¹.K⁻¹
W.m⁻².K⁻¹
J.m⁻².K⁻¹
W⁻¹m²K

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

Smooth
Oily
Coated
Glazed

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Heat Transfer
Boiling point of a solution according to Duhring's rule is a linear function of the __________ of water.

Thermal conductivity
Boiling point (at the same pressure)
Viscosity
Density

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Heat Transfer
For large heat transfer area requirement, shell and tube heat exchanger is preferred, because it

Occupies smaller space
All of these
Is easy to operate and maintain
Is more economical

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Heat Transfer
The capacity of double-effect evaporator is less than half of the capacity of two single effects, each of which is operating over same terminal temperature difference, when the

Solution has an elevation of boiling point
Evaporators opreate at atmospheric pressure
None of these
Evaporators operate under vacuum

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Heat Transfer
The unit of heat transfer co-efficient in SI unit is

J/M2°K
W/m2°K
W/m°K
J/m°K

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