Steam Boilers, Engines, Nozzles and Turbines
The missing quantity per stroke is equal to

Mass of cushion steam + indicated mass of steam
Cylinder feed + indicated mass of steam
Mass of cushion steam + cylinder feed
Cylinder feed indicated mass of steam

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

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

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