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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The action of steam in a steam turbine is

Dynamic
Neither static nor dynamic
Static and dynamic
Static

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Steam Boilers, Engines, Nozzles and Turbines
In a De-Laval nozzle expanding superheated steam from 10 bar to 0.1 bar, the pressure at the minimum cross-section (i. e. pressure at throat, pā‚‚) will be

9.9 bar
5.46 bar
3.3 bar
8.2 bar

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Steam Boilers, Engines, Nozzles and Turbines
Which of the following substance will have same percentage in both proximate and ultimate analysis?

Ash
Moisture
Volatile matter
Hydrogen

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Steam Boilers, Engines, Nozzles and Turbines
A wet vapor can be completely specified by

Pressure only
Temperature only
Pressure and dryness fraction
Dryness fraction only

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Steam Boilers, Engines, Nozzles and Turbines
The value of diagram factor depends upon

Initial pressure of steam
Initial conditions of steam
Back pressure
All of these

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Steam Boilers, Engines, Nozzles and Turbines
While steam expands in turbines, theoretically the entropy

Decreases
Increases
Behaves unpredictably
Remains constant

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