Steam Boilers, Engines, Nozzles and Turbines
When the speed of the engine is controlled by means of a valve in a steam pipe, which regulates the pressure of steam entering the engine, then the governing is known as

Throttle governing
Cut-off governing
None of these
By-pass governing

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

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

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