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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
Extract heat from the exhaust flue gases
Increase flue gas temperature

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Steam Boilers, Engines, Nozzles and Turbines
The feed check valve is used in order to

Recirculate unwanted feed water
Allow high pressure feed water to flow to drum and not allow reverse flow to take place
Check level of water in boiler drum
Regulate flow of boiler water

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Steam Boilers, Engines, Nozzles and Turbines
Superheating of steam is done at

Constant pressure
Constant volume
Constant temperature
Constant entropy

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Steam Boilers, Engines, Nozzles and Turbines
Thermal efficiency of a thermal power plant is of the order of

0.15
0.45
0.3
0.2

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Steam Boilers, Engines, Nozzles and Turbines
The basic purpose of drum in boiler is to

Separate steam from water
Serve as storage of steam
Serve as storage of feed water for water wall
Remove salts from water

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

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

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MORE MCQ ON Steam Boilers, Engines, Nozzles and Turbines

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