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 Injector Superheater Air-preheater Economizer Injector Superheater Air-preheater Economizer ANSWER DOWNLOAD EXAMIANS APP
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 282 kW 260 kW 296 kW 302 kW 282 kW 260 kW 296 kW 302 kW ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Secondary air is the air used to Convert CO (formed in lower zone of furnace) into CO₂ at higher zone Air delivered by induced draft fan Transport and dry the coal Provide air around burners for obtaining optimum combustion Convert CO (formed in lower zone of furnace) into CO₂ at higher zone Air delivered by induced draft fan Transport and dry the coal Provide air around burners for obtaining optimum combustion ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The blade friction in the impulse turbine reduces the velocity of steam by __________ while it passes over the blades. 10 to 15% 15 to 20% 20 to 30% 30 to 40% 10 to 15% 15 to 20% 20 to 30% 30 to 40% ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Blading efficiency is also known as Stage efficiency Nozzle efficiency Diagram efficiency None of these Stage efficiency Nozzle efficiency Diagram efficiency None of these ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The velocity of steam at throat of the nozzle is __________ the velocity of sound. More than Equal to Less than None of these More than Equal to Less than None of these ANSWER DOWNLOAD EXAMIANS APP
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