Heat Transfer
Which is the most suitable for the concentration of foamy & frothy liquors?

None of these
Long tube vertical evaporator
Agitated film evaporator
Open pan evaporator

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Heat Transfer
Leidenfrost point is a term concerned with the

Condensation of the saturated vapor on a cold surface
Heat transfer between two highly viscous liquids
Concentration of a corrosive solution by evaporation
Boiling of a liquid on a hot surface

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