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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
A supercritical boiler is one that operates above the pressure and temperature of following values

1 kg/cm² and 100°C
100 kg/cm² and 540°C
218 kg/cm² abs and 373°C
218 kg/cm² abs and 540°C

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

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

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Steam Boilers, Engines, Nozzles and Turbines
The diameter of internal flue tubes of a Lancashire boiler is about ___ that of its shell.

One-fourth
Two-fifth
One-half
One-third

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Steam Boilers, Engines, Nozzles and Turbines
The critical pressure ratio for initially wet steam is

0.601
0.577
0.546
0.582

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Steam Boilers, Engines, Nozzles and Turbines
Ultimate analysis of fuel is determination of percentage of

Higher calorific value
Carbon, hydrogen, nitrogen, sulphur, moisture
Lower calorific value
Fixed carbon, ash, volatile matter, moisture

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Steam Boilers, Engines, Nozzles and Turbines
Steam exhaust from high pressure turbine is reheated in

Superheater tubes
A separate coil located in convection path
Economizer
Boiler drums

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