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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The pressure of feed water has to be raised before its entry into the boiler. The pressure is raised by a device known as

Injector
Feed check valve
Pressure gauge
Feed pump

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Steam Boilers, Engines, Nozzles and Turbines
Gusset stays in a boiler are provided to

Prevent leakage of hot flue gases
Prevent the bulging of flat surfaces
Avoid explosion in furnace
Support furnace freely from top

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Steam Boilers, Engines, Nozzles and Turbines
In a steam condenser, the partial pressure of steam and air are 0.06 bar and 0.007 bar respectively. The condenser pressure is

0.06 bar
0.053 bar
0.067 bar
0.007 bar

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Steam Boilers, Engines, Nozzles and Turbines
Secondary air is the air used to

Air delivered by induced draft fan
Transport and dry the coal
Provide air around burners for obtaining optimum combustion
Convert CO (formed in lower zone of furnace) into CO₂ at higher zone

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Steam Boilers, Engines, Nozzles and Turbines
The discharge is __________ at critical pressure.

Maximum
None of these
Zero
Minimum

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Steam Boilers, Engines, Nozzles and Turbines
The reheat factor depends upon

Turbine stage efficiency
All of these
Exit pressure
Initial pressure and superheat

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