Heat Transfer
Evaporation by thermocompression results in the

Both A and B
Saving of steam
None of these
Realisation of multiple effect economy in a single effect

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Heat Transfer
Finned tube heat exchangers

facilitate very large temperature drop through tube wall
give larger area per tube
are used for smaller heat load
use metal fins of low thermal conductivity

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Heat Transfer
If Prandtl number is greater than the Schmidt number, then the

thermal & concentration boundary layers are of equal thickness
concentration boundary layer lies inside the thermal boundary layer
thermal boundary layer lies inside the concentration boundary layer
none of the listed here

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