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Steam Boilers, Engines, Nozzles and Turbines

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

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

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Steam Boilers, Engines, Nozzles and Turbines
The heat balance sheet for the boiler shows the

Steam formed by combustion of hydrogen per kg of fuel
Moisture present in the fuel
All of these
Complete account of heat supplied by 1 kg of dry fuel and the heat consumed

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Steam Boilers, Engines, Nozzles and Turbines
Efficiency of Rankine cycle can be increased by

Decreasing initial steam pressure and temperature
Decreasing exhausts pressure
Increasing the expansion ratio
Increasing exhaust pressure

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Steam Boilers, Engines, Nozzles and Turbines
When the cross-section of a nozzle increases continuously from entrance to exit, it is called a

Convergent-divergent nozzle
None of these
Divergent nozzle
Convergent nozzle

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Steam Boilers, Engines, Nozzles and Turbines
When the cross-section of a nozzle __________ continuously from entrance to exit, it is called a convergent nozzle.

Remain same
None of these
Decreases
Increases

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Steam Boilers, Engines, Nozzles and Turbines
The diameter of superheated tubes in a locomotive boiler is

230 mm
13 mm
31 mm
130 mm

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