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Heat Transfer

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

Oily
Glazed
Coated
Smooth

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Heat Transfer
Overall thermal resistance for conductive heat transfer through a series of flat resistances is equal to the

Maximum resistance in the series
Minimum resistance presents in the series
Average of all resistances
Sum of all resistances

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Heat Transfer
For shell and tube heat exchanger, with increasing heat transfer area, the purchased cost per unit heat transfer area

Remains constant
Decreases
Passes through a maxima
Increases

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Heat Transfer
The heat transfer co-efficient in film type condensation is __________ that for dropwise condensation.

Half
Is same as
Lower than
Greater than

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Heat Transfer
The wavelength at which the maximum monochromatic emissive power occurs for a black body, is (where, T = absolute temperature of the black body)

α T⁴
Independent of T
αT
α 1/T

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Heat Transfer
The number of kg vaporised per kg of steam fed to the evaporator is defined as

Rate of evaporation
Economy
Rate of vaporisation
Capacity

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MORE MCQ ON Heat Transfer

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