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Steam Boilers, Engines, Nozzles and Turbines

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

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

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Steam Boilers, Engines, Nozzles and Turbines
The value of the reheat factor varies from

1.2 to 1.6
1.6 to 2
1.02 to 1.06
1.08 to 1.10

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

Both (A) and (B)
None of these
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
Steam exhaust from high pressure turbine is reheated in

A separate coil located in convection path
Superheater tubes
Economizer
Boiler drums

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Steam Boilers, Engines, Nozzles and Turbines
The amount of water evaporated from feed water at _________ into dry and saturated steam at 100° C at normal atmospheric pressure is called equivalent evaporation from and at 100° C.

40°C
60°C
0°C
100°C

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Steam Boilers, Engines, Nozzles and Turbines
Desecration of feed water is carried out because it reduces

pH value of water
Cavitation of boiler feed pumps
Heat transfer coefficient
Corrosion caused by oxygen

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