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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The biggest size of thermal power unit operating in India is

60 MW
100 MW
500 MW
30 MW

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

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

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Steam Boilers, Engines, Nozzles and Turbines
The ratio of the temperature rise of cooling water to the vacuum temperature minus inlet cooling water temperature is called

Vacuum efficiency
Nozzle efficiency
Condenser efficiency
Boiler efficiency

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

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

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Steam Boilers, Engines, Nozzles and Turbines
In a reaction turbine, when steam flows through the fixed blades,

Pressure and velocity both decreases
Pressure and velocity both increases
Pressure decreases while velocity increases
Pressure increases while velocity decreases

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Steam Boilers, Engines, Nozzles and Turbines
The friction present between the steam and the nozzle surfaces reduces the heat drop by

40 to 60%
25 to 40%
15 to 25%
10 to 15%

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MORE MCQ ON Steam Boilers, Engines, Nozzles and Turbines

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