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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
Curtis turbine is a

Velocity compounded turbine
Pressure compounded turbine
Pressure-velocity compounded turbine
Simple reaction turbine

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Steam Boilers, Engines, Nozzles and Turbines
When the circulation of water, in a boiler, is by a centrifugal pump, then the boiler is known as

Internally fired boiler
Externally fired boiler
Forced circulation boiler
Natural circulation boiler

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Steam Boilers, Engines, Nozzles and Turbines
The critical pressure ratio for initially superheated steam is __________ as compared to initially dry saturated steam.

None of these
Less
Same
More

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Steam Boilers, Engines, Nozzles and Turbines
In a De-Laval nozzle expanding superheated steam from 10 bar to 0.1 bar, the pressure at the minimum cross-section (i. e. pressure at throat, pā‚‚) will be

8.2 bar
3.3 bar
5.46 bar
9.9 bar

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Steam Boilers, Engines, Nozzles and Turbines
The air pressure at the fuel bed is reduced below that of atmosphere by means of a fan placed at or near the bottom of the chimney to produce a draught. Such a draught is called

Balanced draught
Natural draught
Induced draught
Forced draught

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Steam Boilers, Engines, Nozzles and Turbines
The expansion of steam in a nozzle follows

Carnot cycle
Joule cycle
Rankine cycle
Stirling cycle

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