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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
At which pressure the properties of water and steam become identical

100 kg/cm²
225.6 kg/cm²
1 kg/cm²
0.1 kg/cm²

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Steam Boilers, Engines, Nozzles and Turbines
The average operating pressure of Benson boiler is

200 bar
100 bar
250 bar
150 bar

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Steam Boilers, Engines, Nozzles and Turbines
The temperature of flue gases at air heater outlet should be

Less than wet bulb temperature of flue gases
Below dew point temperature of flue gases
100°C
Above dew point temperature of flue gases

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Steam Boilers, Engines, Nozzles and Turbines
Pick up wrong statement about desired properties of a good fuel

High ignition point
Produce minimum smoke and gases
Ease in storing
High calorific value

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Steam Boilers, Engines, Nozzles and Turbines
Cut-off governing as compared to throttle governing is

More efficient and more economical
More efficient and less economical
Less efficient and less economical
Less efficient and more economical

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Steam Boilers, Engines, Nozzles and Turbines
The diameter of a cylindrical shell of a Scotch marine boiler varies from

None of these
1.5 to 2 m
2.5 to 3.5 m
3.5 to 4.5 m

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