Steam Boilers, Engines, Nozzles and Turbines
The equivalent evaporation of a boiler is a measure to compare

The two different boilers of the same make
The given boiler with the model
Any type of boilers operating under any conditions
Two different makes of boilers operating under the same operating conditions

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

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

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