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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

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

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Steam Boilers, Engines, Nozzles and Turbines
In reaction turbines, the axial thrust is due to

None of these
Both (A) and (B)
Pressure drop across the rotor
Change in axial velocity

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Steam Boilers, Engines, Nozzles and Turbines
An air preheater is installed

Before the superheater
Between the economiser and chimney
Before the economiser
None of these

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Steam Boilers, Engines, Nozzles and Turbines
The pressure at which latent heat of vaporisation of water is zero, is

100 kg/cm²
Below atmospheric pressure
225.6 kg/cm²
1 kg/cm²

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Steam Boilers, Engines, Nozzles and Turbines
Pulverized fuel is used for

Medium sized units
Better burning
Less radiation loss
More calorific value

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

Diagram efficiency
Nozzle efficiency
None of these
Gross efficiency

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