Steam Boilers, Engines, Nozzles and Turbines
De-Laval turbines are mostly used

For small power purposes and high speeds
For small power purposes and low speeds
Where low speeds are required
For large power purposes

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Steam Boilers, Engines, Nozzles and Turbines
The relative efficiency is defined as the

Ratio of heat equivalent to indicated power to the energy supplied in steam
Ratio of thermal efficiency to Rankine efficiency
Ratio of brake power to the indicated power
Product of thermal efficiency and Rankine efficiency

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