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

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

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Steam Boilers, Engines, Nozzles and Turbines
The diagram factor is the ratio of the

Actual mean effective pressure to the theoretical mean effective pressure
Actual workdone per stroke to the theoretical workdone per stroke
Any one of the above
Area of the actual indicator diagram to the area of theoretical indicator diagram

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