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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The economiser is used in boilers to

Increase thermal efficiency of boiler
Economize on fuel
Increase flue gas temperature
Extract heat from the exhaust flue gases

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Steam Boilers, Engines, Nozzles and Turbines
Stage efficiency is also known as

None of these
Gross efficiency
Diagram efficiency
Nozzle efficiency

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Steam Boilers, Engines, Nozzles and Turbines
Parson's reaction turbine is a __________ reaction turbine.

60 percent
40 percent
70 percent
50 percent

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Steam Boilers, Engines, Nozzles and Turbines
The efficiency of a pressure-velocity compounded impulse turbine is __________ as compared to pressure compounded impulse turbine.

None of these
Same
More
Less

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Steam Boilers, Engines, Nozzles and Turbines
The variation of steam pressure in the nozzle depends upon

Dryness fraction of steam
Specific volume of steam
Velocity of steam
All of these

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Steam Boilers, Engines, Nozzles and Turbines
If the critical pressure ratio for steam is 0.546, then the steam is initially

Wet steam
None of these
Superheated steam
Dry saturated steam

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