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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
In a velocity compounded impulse turbine, when steam flows through the second row of moving blades,

Velocity remains constant
Velocity increases
Pressure remains constant
Velocity decreases

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

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

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Steam Boilers, Engines, Nozzles and Turbines
The natural draught is produced by

Centrifugal fan
Chimney
Steam jet
Both (A) and (B)

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Steam Boilers, Engines, Nozzles and Turbines
The pressure of reheat steam after passing through reheater compared to inlet condition is

Equal
May be more or less depending on capacity of reheater
Less
More

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Steam Boilers, Engines, Nozzles and Turbines
The three "Ts" for good combustion are

Total air, time, and temperature
Total air, true fuel, and turbulence
Temperature, time, and turbulence
Thorough mixing, total air and temperature

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

Stage efficiency
Diagram efficiency
Nozzle efficiency
None of these

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