Steam Boilers, Engines, Nozzles and Turbines
The aim of a compound steam engine is

To reduce the length of stroke
To reduce the temperature range in each cylinder
To reduce the ratio of expansion in each cylinder
All of these

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

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

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