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

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

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Steam Boilers, Engines, Nozzles and Turbines
Degree of reaction is defined as the ratio of

Heat drop in fixed blades to the heat drop in moving blades
Heat drop in fixed blades plus heat drop in moving blades to the heat drop in moving blades
Heat drop in moving blades to the heat drop in fixed blades plus heat drop in moving blades
Heat drop in moving blades to the heat drop in fixed blades

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