Steam Boilers, Engines, Nozzles and Turbines
The overall efficiency of thermal power plant is

All the three above plus gas cycle efficiency
Regenerative cycle efficiency
Carnot cycle efficiency
Boiler efficiency, turbine efficiency, generator efficiency

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Steam Boilers, Engines, Nozzles and Turbines
Locomotive boiler is a

Multi-tubular, horizontal, internally fired and mobile boiler
Single tube, horizontal, internally fired and stationary boiler
Single tube, vertical, externally fired and stationary boiler
Multi-tubular, horizontal, externally fired and stationary boiler

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