Steam Boilers, Engines, Nozzles and Turbines
In a single acting steam engine

The steam is admitted on one side of the piston and one working stroke is produced during each revolution of the crankshaft
The steam is admitted on one side of the piston and two working strokes are produced during each revolution of the crankshaft
The steam is admitted, in turn, on both sides of the piston and one working stroke is produced during each revolution of the crankshaft
The steam is admitted, in turn, on both sides of the piston and two working strokes are produced during each revolution of the crankshaft

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Steam Boilers, Engines, Nozzles and Turbines
The effect of friction on the flow of steam through a nozzle is to

Increase the exit temperature without any effect on mass flow rate
Increase the mass flow rate and to increase the exit temperature
Decrease the mass flow rate and to increase the wetness of steam
Decrease the mass flow rate and to decrease the wetness of steam

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