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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
Steam turbines are used for

All of these
Electric power generation
Direct drive of fans, compressors, pumps
Large marine propulsion

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Steam Boilers, Engines, Nozzles and Turbines
A closed vessel made of steel and used for the generation of steam is called a

Steam turbine
Steam condenser
Steam boiler
Steam injector

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Steam Boilers, Engines, Nozzles and Turbines
A throttle governed steam engine develops 15 kW with 280 kg per hour of steam and 35 kW with 520 kg per hour of steam. The steam consumption in kg per hour when developing 20 kW will be nearly

210 kg/h
280 kg/h
150 kg/h
340 kg/h

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Steam Boilers, Engines, Nozzles and Turbines
In a 50% reaction turbine stage, tangential component of absolute velocity at rotor inlet is 537 m/s and the blade velocity is 454 m/s. The power output in kW of steam will be

296 kW
260 kW
282 kW
302 kW

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Steam Boilers, Engines, Nozzles and Turbines
Film boiling occurs at

Very high pressures
Medium pressures
Atmospheric pressures
Very low pressure

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Steam Boilers, Engines, Nozzles and Turbines
When the total heat of steam is h kJ/kg and the sensible heat of feed water is hf1 kJ/kg, then the factor of evaporation is given by

(h + hf1)/2257
(h × hf1)/2257
(h - hf1)/2257
None of these

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