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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The ratio of total useful heat drop to the total isentropic heat drop, is called

Rankine efficiency
Internal efficiency
Stage efficiency
None of these

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

1 m
2 m
1.5 m
2.5 m

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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 device attached to the steam chest for preventing explosions due to excessive internal pressure of steam is called

Water level indicator
Safety valve
Fusible plug
Pressure gauge

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

0.4
0.75
0.9
0.5

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Steam Boilers, Engines, Nozzles and Turbines
The factor of evaporation for all boilers is always

Equal to unity
Greater than unity
None of these
Less than unity

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