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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The forced circulation of water does not take place in

Velox boiler
LaMont boiler
Benson boiler
Lancashire boiler

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Steam Boilers, Engines, Nozzles and Turbines
Green coal, in order to be burnt, must be

Heated sufficiently
Burnt in excess air
Burnt as powder
Heated to its ignition point

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

Temperature alone
Pressure alone
Pressure and temperature
Pressure and dryness fraction

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Steam Boilers, Engines, Nozzles and Turbines
Primary air is the air used to

Provide air around burners for obtaining optimum combustion
Transport and dry the coal
Air delivered by forced draft fan
Convert CO (formed in lower zone of furnace) into CO₂ at higher zone

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Steam Boilers, Engines, Nozzles and Turbines
In locomotive boiler, maximum steam pressure is limited to

10 kg/cm²
1 kg/cm²
18 kg/cm²
5 kg/cm²

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Steam Boilers, Engines, Nozzles and Turbines
The ratio of the workdone on the blades to the energy supplied to the blades, is called

Nozzle efficiency
Mechanical efficiency
Gross or stage efficiency
Blading efficiency

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