Steam Boilers, Engines, Nozzles and Turbines
In water tube boilers

The flames and hot gases pass through the tubes which are surrounded by water
Forced circulation takes place
None of these
Water passes through the tubes which are surrounded by flames and hot gases

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

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

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