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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
With increase in load, radiant superheater has

Rising characteristic
Linear characteristic
Flat characteristic
Drooping characteristic

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Steam Boilers, Engines, Nozzles and Turbines
The average value of diagram factor lies between

0.5 to 0.65
0.8 to 1.2
0.2 to 0.5
0.65 to 0.9

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Steam Boilers, Engines, Nozzles and Turbines
The shell diameter and length of locomotive boiler are

2 m, 4 m
1 m, 4 m
1.5 m, 6 m
1.5 m, 4 m

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Steam Boilers, Engines, Nozzles and Turbines
The velocity of steam leaving the nozzle (V) is given by (where K = Nozzle coefficient or nozzle efficiency, and hd = Enthalpy or heat drop during expansion of steam in a nozzle)

V = 44.72 K hd
V = 44.72 hd K
V = 44.72 K hd
V = 44.72 K hd

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Steam Boilers, Engines, Nozzles and Turbines
The increase in pressure

Does not affects the boiling point of a liquid
Raises the boiling point of a liquid
Reduces its volume
Lowers the boiling point of a liquid

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Steam Boilers, Engines, Nozzles and Turbines
The fire tubes in, a Coarran and Scottish marine boiler are

Both horizontal and vertical
Vertical
Inclined
Horizontal

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