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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Steam Boilers, Engines, Nozzles and Turbines
Pick up the correct statement as regards Cornish boiler and Lancashire boiler

Lancashire has two fire tubes and Cornish has one
Cornish is fire tube and Lancashire is water tube
Cornish has two fire tubes and Lancashire has one
Cornish is water tube and Lancashire is fire tube

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