Steam Boilers, Engines, Nozzles and Turbines The economiser is used in boilers to Extract heat from the exhaust flue gases Economize on fuel Increase thermal efficiency of boiler Increase flue gas temperature Extract heat from the exhaust flue gases Economize on fuel Increase thermal efficiency of boiler Increase flue gas temperature ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The diameter of Cornish boiler is of the order of 1.52.5 m 2.53.5 m 12 m 23 m 1.52.5 m 2.53.5 m 12 m 23 m ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Desecration of feed water is carried out because it reduces Cavitation of boiler feed pumps Heat transfer coefficient Corrosion caused by oxygen pH value of water Cavitation of boiler feed pumps Heat transfer coefficient Corrosion caused by oxygen pH value of water ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The clearance in the engine cylinder All of these Increases the mean effective pressure Decreases the efficiency of the engine Increases the workdone All of these Increases the mean effective pressure Decreases the efficiency of the engine Increases the workdone ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The maximum efficiency of a reaction turbine is (1 + cos²α)/2 cos²α (1 + sin²α)/2 sin²α 2 cos²α/(1 + cos²α) 2 sin²α/(1 + sin²α) (1 + cos²α)/2 cos²α (1 + sin²α)/2 sin²α 2 cos²α/(1 + cos²α) 2 sin²α/(1 + sin²α) ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines At very low temperature, the melting and boiling temperatures become equal. This temperature is 373°K 273.16°K 0°K 303°K 373°K 273.16°K 0°K 303°K ANSWER DOWNLOAD EXAMIANS APP
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