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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The specific heat of superheated steam in kcal/kg is generally of the order of

0.1
0.8
0.5
0.3

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Steam Boilers, Engines, Nozzles and Turbines
The ratio of the volume at cut-off to the swept volume is called

Expansion ratio
None of these
Clearance ratio
Cut-off ratio

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Steam Boilers, Engines, Nozzles and Turbines
The critical pressure ratio for initially dry saturated steam is

0.577
0.601
0.582
0.546

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Steam Boilers, Engines, Nozzles and Turbines
The function of injector used in small steam plants is to

Dose chemicals in feed water
Pump feed water
Create vacuum in furnace
Create vacuum at turbine exhaust

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Steam Boilers, Engines, Nozzles and Turbines
In a nozzle, the effect of super-saturation is to

Increase the heat drop
Increase the entropy
Decrease specific volume of steam
Decrease dryness fraction of steam

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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.

Same
Less
More
None of these

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