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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

Centrifugal pump
Reciprocating pump
Gear pump
Axial flow pump

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Steam Boilers, Engines, Nozzles and Turbines
The shell diameter of a Locomotive boiler is

1 m
2.5 m
2 m
1.5 m

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Steam Boilers, Engines, Nozzles and Turbines
The critical pressure ratio for gases is

0.582
0.546
0.577
0.528

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Steam Boilers, Engines, Nozzles and Turbines
Primary 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 forced draft fan

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Steam Boilers, Engines, Nozzles and Turbines
A boiler in India should conform to safety regulations of

DIN
IBR
ASTM
BS

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Steam Boilers, Engines, Nozzles and Turbines
The draught may be produced by a

Mechanical fan
All of these
Chimney
A steam jet

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