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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
For the same diameter and thickness of tube, a water tube boiler has ________ heating surface as compared to fire tube boiler.

Less
Equal
None of these
More

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

Rankine efficiency
Stage efficiency
Internal efficiency
Reheat factor

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

Linear characteristic
Drooping characteristic
Rising characteristic
Flat characteristic

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Steam Boilers, Engines, Nozzles and Turbines
When the nozzle operates with the maximum mass flow, the nozzle is said to be

Under-damping
Choked
Over-damping
None of these

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Steam Boilers, Engines, Nozzles and Turbines
O₂ content in atmospheric air on volume basis is

0.3
0.21
0.23
0.4

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Steam Boilers, Engines, Nozzles and Turbines
Equivalent evaporation is the amount of water evaporated in a boiler from and at

100°C
Saturation temperature at given pressure
0°C
Room temperature

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