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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
Calorific value of coal is of the order of

800-1200 kcal/ kg
5000-8000 kcal/ kg
200-400 kcal/ kg
2000-4000 kcal/ kg

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Steam Boilers, Engines, Nozzles and Turbines
In an experiment to determine dryness fraction of steam, the mass of water separated was 1.2 kg in 15 mts. and the mass of steam passed out in same time was 4.8 kg. Dryness fraction is

0.5
0.4
0.25
0.8

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Steam Boilers, Engines, Nozzles and Turbines
The discharge is __________ at critical pressure.

None of these
Minimum
Maximum
Zero

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Steam Boilers, Engines, Nozzles and Turbines
The ratio of the work-done on the blades per kg of steam to the total energy supplied per stage per kg of steam is called

Stage efficiency
Nozzle efficiency
Mechanical efficiency
Blading efficiency

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Steam Boilers, Engines, Nozzles and Turbines
Which of the following boiler works on a forced circulation of water?

Loeffler boiler
All of these
Lamont boiler
Benson boiler

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Steam Boilers, Engines, Nozzles and Turbines
The state of vapor under saturation condition is described by

Pressure and temperature
Temperature alone
Pressure and dryness fraction
Pressure alone

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