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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The critical pressure gives the velocity of steam at the throat

None of these
Less than the velocity of sound
Equal to the velocity of sound
More than the velocity of sound

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Steam Boilers, Engines, Nozzles and Turbines
If partial pressure of air and steam be ‘pa’ and ‘ps’ respectively in a condenser, then according to Dalton's law, the pressure in condenser is equal to

ps - pa
pa + ps
pa - ps
None of these

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Steam Boilers, Engines, Nozzles and Turbines
Which of the following boilers is best suited to meet fluctuating demands?

Lancashire
Babcock and Wilcox
Locomotive
Cochran

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Steam Boilers, Engines, Nozzles and Turbines
Superheating of steam is done at

Constant temperature
Constant volume
Constant entropy
Constant pressure

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Steam Boilers, Engines, Nozzles and Turbines
A device in which some portion of waste heat of flue gases is recovered to heat the air before it passes to the furnace for combustion purpose, is known as

Superheater
Injector
Economizer
Air-preheater

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Steam Boilers, Engines, Nozzles and Turbines
The diameter of Cornish boiler is of the order of

23 m
12 m
2.53.5 m
1.52.5 m

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