Steam Boilers, Engines, Nozzles and Turbines
When the inlet pressure of steam is equal to the exit pressure, then

Pressure drops and fluid flows through the nozzle
There is no pressure drop and fluid does not flow through the nozzle
There is a pressure drop in the nozzle
Fluid flows through the nozzle

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Steam Boilers, Engines, Nozzles and Turbines
A regenerative steam cycle renders

Decreased work output per unit mass of steam
Decreased work output per unit mass of steam as well as increased thermal efficiency
Increased thermal efficiency
Increased work output per unit mass of steam

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