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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The natural draught is produced by

Centrifugal fan
Both (A) and (B)
Chimney
Steam jet

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Steam Boilers, Engines, Nozzles and Turbines
The shell diameter of a Locomotive boiler is

1 m
2.5 m
1.5 m
2 m

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Steam Boilers, Engines, Nozzles and Turbines
Pick up the wrong statement about critical condition of steam

Liquid directly becomes steam
Specific volume of steam and liquid is same
Latent heat is zero
This is the maximum pressure limit

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Steam Boilers, Engines, Nozzles and Turbines
A condenser in a steam power plant

All of these
Reduces temperature of exhaust steam
Reduces back pressure of steam
Increases expansion ratio of steam

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Steam Boilers, Engines, Nozzles and Turbines
The ratio of the temperature rise of cooling water to the vacuum temperature minus inlet cooling water temperature is called

Nozzle efficiency
Boiler efficiency
Condenser efficiency
Vacuum efficiency

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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
8.2 bar
3.3 bar

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