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
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
In cross compounding, the cylinders are arranged

Side by side and each cylinder has separate piston, connecting rod and crank
Side by side and each cylinder has common piston, connecting rod and crank
At 90° and each cylinder has common piston, connecting rod and crank
At 90° and each cylinder has separate piston, connecting rod and crank

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