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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The supersaturated flow of steam through a nozzle as compared to a stable flow, the available heat drop

Decreases
Is unpredictable
Increases
Remains the same

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

1 m
2 m
2.5 m
1.5 m

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Steam Boilers, Engines, Nozzles and Turbines
A turbine is said to have an axial discharge when the steam leaves the blade tip at _________ to the direction of the blade motion.

180°
90°
60°
270°

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Steam Boilers, Engines, Nozzles and Turbines
Thermal efficiency of well maintained boiler will be of the order

0.9
0.4
0.5
0.75

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Steam Boilers, Engines, Nozzles and Turbines
Mechanical equivalent of heat for 1 kcal or Joule's equivalent is equal to

102 kg.m
421 kg.m
421 kg.m
539 kg.m

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

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

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