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Steam Boilers, Engines, Nozzles and Turbines

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

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

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Steam Boilers, Engines, Nozzles and Turbines
The missing quantity per stroke is equal to

Mass of cushion steam + indicated mass of steam
Cylinder feed + indicated mass of steam
Mass of cushion steam + cylinder feed
Cylinder feed indicated mass of steam

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Steam Boilers, Engines, Nozzles and Turbines
Efficiency of Rankine cycle can be increased by

Increasing the expansion ratio
Decreasing exhausts pressure
Increasing exhaust pressure
Decreasing initial steam pressure and temperature

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Steam Boilers, Engines, Nozzles and Turbines
Water at pressure of 4 kg/cm² and 160°C temperature when exposed to atmosphere will

Remain as it was
Flash i.e. get converted into steam
Cool down
Boil

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Steam Boilers, Engines, Nozzles and Turbines
The ratio of the workdone on the blades to the energy supplied to the blades, is called

Gross or stage efficiency
Nozzle efficiency
Blading efficiency
Mechanical efficiency

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

60 percent
50 percent
70 percent
40 percent

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MORE MCQ ON Steam Boilers, Engines, Nozzles and Turbines

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