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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
One kg of steam sample contains 0.8 kg dry steam? Its dryness fraction is

0.6
0.8
1
0.2

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Steam Boilers, Engines, Nozzles and Turbines
A double acting steam engine with a cylinder diameter of 190 mm and a stroke of 300 mm has a cut-off of 0.35. The expansion ratio for this engine is nearly

6.65
2.86
1.05
10.05

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Steam Boilers, Engines, Nozzles and Turbines
Cut-off governing of steam engines is a method of controlling the engine output by varying

Temperature of intake steam
Pressure of intake steam
Volume of intake steam
All of these

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Steam Boilers, Engines, Nozzles and Turbines
Reheating of steam in a turbine

Increases the work-done through the turbine
Increases the efficiency of the turbine
All of these
Reduces wear on the blades

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Steam Boilers, Engines, Nozzles and Turbines
Proximate analysis of fuel is determination of percentage of

Lower calorific value
Fixed carbon, ash, volatile matter, moisture
Carbon, hydrogen, nitrogen, sulphur, moisture
Higher calorific value

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Steam Boilers, Engines, Nozzles and Turbines
The critical pressure at which latent heat of vaporisation is zero is

1 kgf/ cm²
273 kgf/ cm²
225.65 kgf/ cm²
100 kgf/ cm²

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