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Heat Transfer

Heat Transfer
Mechanical recompression evaporation is used in the production of

Distilled water
Alcohol
Fruits jam
Salt

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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

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

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Heat Transfer
'Fouling factor' used in the design of a multipass shell and tube heat exchanger is a

Conversion factor for individual film heat transfer co-efficient to overall heat transfer co-efficient
None of these
Factor of safety
Non-dimensional factor

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

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

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Heat Transfer
Conductance is given by(where, x = thickness, A = heat flow area, K = thermal conductivity.)

A/Kx
KA/x
K/Ax
X/KA

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Heat Transfer
Vent pipes are provided in a condenser to

Remove non-condensable gases
None of these
Facilitate easy cleaning of tubes
Purge the condenser

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MORE MCQ ON Heat Transfer

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