Engineering Thermodynamics
During throttling process

All of these
There is no change of internal energy of steam
No work is done by expanding steam
Heat exchange does not take place

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Engineering Thermodynamics
The distillation carried out in such a way that the liquid with the lowest boiling point is first evaporated and re-condensed, then the liquid with the next higher boiling point is then evaporated and re-condensed, and so on until all the available liquid fuels are separately recovered in the sequence of their boiling points. Such a process is called

Cracking
Full distillation
Carbonisation
Fractional distillation

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