Steam Boilers, Engines, Nozzles and Turbines
Incomplete combustion can be best judged by

Measuring temperature of flue gases at exit of furnace
Smoky chimney exit
Excess air in flue gases
Measuring carbon monoxide in flue gases

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Steam Boilers, Engines, Nozzles and Turbines
In a single acting steam engine

The steam is admitted on one side of the piston and one working stroke is produced during each revolution of the crankshaft
The steam is admitted, in turn, on both sides of the piston and one working stroke is produced during each revolution of the crankshaft
The steam is admitted, in turn, on both sides of the piston and two working strokes are produced during each revolution of the crankshaft
The steam is admitted on one side of the piston and two working strokes are produced during each revolution of the crankshaft

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