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STEAM BOILERS, ENGINES, NOZZLES AND TURBINES

Steam Boilers, Engines, Nozzles and Turbines
The stage efficiency (ηS) is given by (where ηB = Blading efficiency, and ηN = Nozzle efficiency)

ηS = ηB / ηN
ηS = ηB × ηN
ηS = ηN / ηB
None of the listed here

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Steam Boilers, Engines, Nozzles and Turbines
The dry saturated steam at very high pressure (150200 kg/cm²) when throttled to atmosphere will become

Wet
Remain dry saturated
Superheated
Dry

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Steam Boilers, Engines, Nozzles and Turbines
A binary vapor plant consists of

Steam condenser
Steam turbine
All of the listed here
Mercury boiler

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Steam Boilers, Engines, Nozzles and Turbines
Feed water conditioning in thermal power plants in done to

Increase efficiency of thermal power plant
Reduce hardness and for removal of solids
Increase steam parameters
Increase heat transfer rate

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Steam Boilers, Engines, Nozzles and Turbines
A device in which some portion of waste heat of flue gases is recovered to heat the air before it passes to the furnace for combustion purpose, is known as

Economizer
Air-preheater
Superheater
Injector

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