Steam Boilers, Engines, Nozzles and Turbines Which of the following is a water tube boiler? Babcock and Wilcox boiler Cochran boiler Lancashire boiler Locomotive boiler Babcock and Wilcox boiler Cochran boiler Lancashire boiler Locomotive boiler ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The length of Lancashire boiler varies from 5 to 6 m 7.25 to 9 m 9 to 10 m 6 to 7 m 5 to 6 m 7.25 to 9 m 9 to 10 m 6 to 7 m ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines During polytropic process All of these Steam may be wet, dry or superheated after expansion Heat transfer takes place across cylinder walls Work is done All of these Steam may be wet, dry or superheated after expansion Heat transfer takes place across cylinder walls Work is done ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Fire tube boilers are those in which Water passes through the tubes and flue gases around it Forced circulation takes place Flue gases pass through tubes and water around it Tubes are laid vertically Water passes through the tubes and flue gases around it Forced circulation takes place Flue gases pass through tubes and water around it Tubes are laid vertically ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The velocity of steam leaving the nozzle (V) is given by (where K = Nozzle coefficient or nozzle efficiency, and hd = Enthalpy or heat drop during expansion of steam in a nozzle) V = 44.72 K hd V = 44.72 hd K V = 44.72 K hd V = 44.72 K hd V = 44.72 K hd V = 44.72 hd K V = 44.72 K hd V = 44.72 K hd ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The maximum discharge of steam through a convergent-divergent nozzle depends upon Initial pressure and volume of steam Area of nozzle at throat Both (A) and (B) Final pressure of steam leaving the nozzle Initial pressure and volume of steam Area of nozzle at throat Both (A) and (B) Final pressure of steam leaving the nozzle ANSWER DOWNLOAD EXAMIANS APP
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