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

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

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Steam Boilers, Engines, Nozzles and Turbines
The function of a piston rod is

To guide motion of the piston rod and to prevent it from bending
To transfer motion from the piston to the cross head
To exhaust steam from the cylinder at proper moment
To convert heat energy of the steam into mechanical work

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