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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
Duplex feed pumps are used in small steam boilers. These operate on the principle of

Gear pump
Centrifugal pump
Reciprocating pump
Axial flow pump

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

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

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

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

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

0.2
0.6
0.8
1

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Steam Boilers, Engines, Nozzles and Turbines
An ideal regenerative cycle is

More than Carnot cycle
Equal to Carnot cycle
Less than Carnot cycle
Could be anything

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Steam Boilers, Engines, Nozzles and Turbines
In order to reduce the rotor speed of an impulse turbine, the method employed is

Pressure-velocity compounding
All of these
Pressure compounding
Velocity compounding

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