Steam Boilers, Engines, Nozzles and Turbines
The heat loss in a boiler takes place in the form of

Heat carried away by flue gases
Moisture present in fuel and steam formed by combustion of hydrogen in fuel
All of these
Heat carried away by ash

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Steam Boilers, Engines, Nozzles and Turbines
Degree of reaction is defined as the ratio of

Heat drop in moving blades to the heat drop in fixed blades
Heat drop in moving blades to the heat drop in fixed blades plus heat drop in moving blades
Heat drop in fixed blades to the heat drop in moving blades
Heat drop in fixed blades plus heat drop in moving blades to the heat drop in moving blades

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