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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The expansion of steam, as it flows over the blades in reaction turbine, represents

Free expansion process
Isentropic process
Throttling process
Isothermal process

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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

Bucket calorimeter
Throttling calorimeter
Separating calorimeter
Combined separating and throttling calorimeter

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Steam Boilers, Engines, Nozzles and Turbines
The ratio of the energy required to produce the artificial draught (expressed in meters head or J/kg of flue gas) to the mechanical equivalent of extra heat carried away per kg of flue gases due to natural draught, is known as

Efficiency of the boiler
Power of the boiler
Efficiency of the fan
Efficiency of the chimney

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Steam Boilers, Engines, Nozzles and Turbines
Cut-off governing as compared to throttle governing is

More efficient and less economical
Less efficient and less economical
More efficient and more economical
Less efficient and more economical

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Steam Boilers, Engines, Nozzles and Turbines
Sulphur in coal results in

Corroding air heaters
Facilitating ash precipitation
All of these
Spontaneous combustion during coal storage

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Steam Boilers, Engines, Nozzles and Turbines
The radius of a dished head is taken approximately as

One
Two
One fourth
Half

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