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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The relative heat absorption for successively added equal areas of boiler convection heating surfaces

Increases
Remain unaffected
Decreases
First increases and then decreases

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Steam Boilers, Engines, Nozzles and Turbines
Water boils when its vapor pressure

Equals that of the surroundings
Equals to atmospheric pressure
Equals 760 mm of mercury
Equals the pressure of water in the container

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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
Cut-off ratio
Clearance ratio

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Steam Boilers, Engines, Nozzles and Turbines
The diameter of Cornish boiler varies from

2 to 3 m
1 to 2 m
0.5 to 1 m
1.25 to 2.5 m

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Steam Boilers, Engines, Nozzles and Turbines
A closed vessel made of steel and used for the generation of steam is called a

Steam injector
Steam turbine
Steam condenser
Steam boiler

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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

2.86
10.05
6.65
1.05

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