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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
An economiser is installed in a boiler primarily to

Increase steam pressure
All of the listed here
Reduce fuel consumption
Superheat the steam

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Steam Boilers, Engines, Nozzles and Turbines
The dry saturated steam at very high pressure (150200 kg/cm²) when throttled to atmosphere will become

Remain dry saturated
Wet
Superheated
Dry

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Steam Boilers, Engines, Nozzles and Turbines
The density of supersaturated steam is about __________ that of the ordinary saturated vapor at the corresponding pressure.

8 times
4 times
2 times
Same as

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Steam Boilers, Engines, Nozzles and Turbines
Steam in water tube boiler as compared to fire tube boiler

Is raised at slower rate
Could be raised at fast/slow rate depending on design
Is raised at same rate
Can be raised rapidly

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Steam Boilers, Engines, Nozzles and Turbines
A condenser where circulating water flows through tubes which are surrounded by steam, in known as

Barometric condenser
Jet condenser
Surface condenser
Evaporative condenser

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Steam Boilers, Engines, Nozzles and Turbines
The mechanical draught _________ with the amount of smoke.

Decreases
Does not effect
Increases
None of these

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