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Steam Boilers, Engines, Nozzles and Turbines

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

Pressure and dryness fraction
Temperature only
Pressure only
Dryness fraction only

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Steam Boilers, Engines, Nozzles and Turbines
In case of condensing steam engines, the pressure of steam in the cylinder during exhaust stroke is _________ the atmospheric pressure.

None of these
Equal to
Lower than
Higher than

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Steam Boilers, Engines, Nozzles and Turbines
The mechanical draught _________ with the amount of smoke.

Decreases
Increases
Does not effect
None of these

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Steam Boilers, Engines, Nozzles and Turbines
The flow of steam is supersonic

At the entrance to the nozzle
At the throat of the nozzle
In the divergent portion of the nozzle
In the convergent portion of the nozzle

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Steam Boilers, Engines, Nozzles and Turbines
Steam turbines may be classified according to

Mode of steam action
Direction of steam flow
Number of stages
All of these

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Steam Boilers, Engines, Nozzles and Turbines
The critical pressure ratio for initially superheated steam is __________ as compared to initially dry saturated steam.

More
None of these
Less
Same

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