Steam Boilers, Engines, Nozzles and Turbines
For water, at pressures below atmospheric;

Melting point rises markedly and boiling point drops markedly
Melting point drops slightly and boiling point drops slightly
Melting point rises slightly and boiling point drops markedly
Melting point drops slightly and boiling point drops markedly

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Steam Boilers, Engines, Nozzles and Turbines
In recuperative air preheaters, the heat is transferred

Heat is transferred by bleeding some gases from furnace
From heating an intermediate material and then heating the air from this material
From a metal wall from one medium to another
By direct mixing

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Steam Boilers, Engines, Nozzles and Turbines
The difference between Cornish boiler and Lancashire boiler is that

Former is water tube type and latter is fire tube type
Former is fire tube type and latter is water tube type boiler
Former contains one fire tube and latter contains two fire tubes
None of the listed here

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