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

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

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Steam Boilers, Engines, Nozzles and Turbines
The theoretical indicator diagram of a simple steam engine is based upon the assumption that

The expansion (or compression) of the steam is hyperbolic
Steam is admitted at boiler pressure and exhausted at condenser pressure
There is no pressure drop due to condensation
All of these

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