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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
In a throttling process

Steam enthalpy remains constant
Steam entropy remains constant
Steam pressure remains constant
Steam temperature remains constant

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Steam Boilers, Engines, Nozzles and Turbines
The rate of discharge through the nozzle ___ when the exit pressure is gradually reduced.

Increases
Remains same
None of the listed here
Decreases

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Steam Boilers, Engines, Nozzles and Turbines
A steam nozzle converts

Potential energy into heat energy of steam
Heat energy of steam into kinetic energy
Heat energy of steam into potential energy
Kinetic energy into heat energy of steam

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Steam Boilers, Engines, Nozzles and Turbines
The shell of the Cochran boiler is made hemispherical

None of these
Both (A) and (B)
To withstand the pressure of steam inside the boiler
To give maximum space and strength

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Steam Boilers, Engines, Nozzles and Turbines
A device used to heat feed water by utilizing the heat in me exhaust flue gases before leaving through the chimney, is known as

Superheater
Fusible plug
Economizer
Stop valve

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Steam Boilers, Engines, Nozzles and Turbines
During polytropic process

Steam may be wet, dry or superheated after expansion
Heat transfer takes place across cylinder walls
Work is done
All of these

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