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Steam Boilers, Engines, Nozzles and Turbines

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

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

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Steam Boilers, Engines, Nozzles and Turbines
De-Laval turbine is a

Simple impulse turbine
None of these
Impulse-reaction turbine
Simple reaction turbine

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Steam Boilers, Engines, Nozzles and Turbines
Water tube boilers are those in which

Water passes through the tubes and flue gases around it
Change in enthalpy
Flue gases pass through tubes and water around it
Work is done during adiabatic expansion

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Steam Boilers, Engines, Nozzles and Turbines
In a steam engine, superheated steam from the boiler is fed into the steam chest at a pressure of

30 atmospheres
40 atmospheres
10 atmospheres
20 atmospheres

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Steam Boilers, Engines, Nozzles and Turbines
Heating wet steam at constant temperature is heating it at constant

Enthalpy
Entropy
Volume
Pressure

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Steam Boilers, Engines, Nozzles and Turbines
Willian’s line follows the law (where b = A constant representing the shape of the Willian’s line, a = Another constant i.e. no load consumption per hour, I.P. = Indicated power, and m = Steam consumption per hour)

m = a + b × I.P.
I.P. = b × m + a
m = (b/I.P.) - a
I.P. = a × m + b

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