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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
In order to obtain superheated steam, a superheater is added in an existing boiler. As as result, furnace vacuum will

Remain unaffected
Worsen
May improve/worsen depending on size
Improve

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Steam Boilers, Engines, Nozzles and Turbines
Efficiency of Rankine cycle can be increased by

Decreasing initial steam pressure and temperature
Increasing exhaust pressure
Increasing the expansion ratio
Decreasing exhausts pressure

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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
Decreases
None of the listed here

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

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

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Steam Boilers, Engines, Nozzles and Turbines
The dry saturated steam at very high pressure (150200 kg/cm²) when throttled to atmosphere will become

Remain dry saturated
Dry
Superheated
Wet

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Steam Boilers, Engines, Nozzles and Turbines
With increase in load, radiant superheater has

Linear characteristic
Rising characteristic
Drooping characteristic
Flat characteristic

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