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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
Evaporative capacity of boiler is expressed as

kg of fuel fired
kg of steam produced per kg of fuel fifed
Steam pressure produced
kg of steam produced

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Steam Boilers, Engines, Nozzles and Turbines
Willian’s line for the steam engine is a straight line relationship between the steam consumption per hour and

Efficiency
Indicated power
Brake power
Pressure of steam

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Steam Boilers, Engines, Nozzles and Turbines
Efficiency of Rankine cycle can be increased by

Decreasing exhausts pressure
Decreasing initial steam pressure and temperature
Increasing exhaust pressure
Increasing the expansion ratio

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Steam Boilers, Engines, Nozzles and Turbines
If a steam sample is nearly in dry condition, then its dryness fraction can be most accurately determined by

Separating calorimeter
Combined separating and throttling calorimeter
Bucket calorimeter
Throttling calorimeter

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Steam Boilers, Engines, Nozzles and Turbines
Water tube boilers are those in which

Work is done during adiabatic expansion
Change in enthalpy
Water passes through the tubes and flue gases around it
Flue gases pass through tubes and water around it

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

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

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