Steam Boilers, Engines, Nozzles and Turbines
In a uniflow engine

Steam enters at one end and exhausts at the centre
Steam enters and exhausts through the same port
Steam enters at the centre and exhausts at the other end
None of these

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Steam Boilers, Engines, Nozzles and Turbines
In recuperative air preheaters, the heat is transferred

From heating an intermediate material and then heating the air from this material
From a metal wall from one medium to another
Heat is transferred by bleeding some gases from furnace
By direct mixing

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Steam Boilers, Engines, Nozzles and Turbines
In an impulse turbine

The steam is expanded in nozzles only and there is a pressure drop and heat drop
The steam is expanded both in fixed and moving blades continuously
The steam is expanded in moving blades only
The pressure and temperature of steam remains constant

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

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

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