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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
A turbine is said to have an axial discharge when the steam leaves the blade tip at _________ to the direction of the blade motion.

60°
270°
90°
180°

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Steam Boilers, Engines, Nozzles and Turbines
The overall efficiency of thermal power plant is

Carnot cycle efficiency
Regenerative cycle efficiency
Boiler efficiency, turbine efficiency, generator efficiency
All the three above plus gas cycle efficiency

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Steam Boilers, Engines, Nozzles and Turbines
The effect of friction in the nozzle ___ dryness fraction of steam.

Increases
Has no effect on
Decreases
None of the listed here

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Steam Boilers, Engines, Nozzles and Turbines
The efficiency of steam turbines may be improved by

Reheating of steam
Binary vapor plant
Regenerative feed heating
Any one of these

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Steam Boilers, Engines, Nozzles and Turbines
For combustion of a fuel, following is essential

Correct fuel air ratio
Proper ignition temperature
O₂ to support combustion
All the three above

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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

Feed pump
Pressure gauge
Feed check valve
Injector

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