Steam Boilers, Engines, Nozzles and Turbines The crown of the fire box is made hemispherical in order to Give maximum strength Give maximum space Withstand pressure inside boiler Resist intense heat in fire box Give maximum strength Give maximum space Withstand pressure inside boiler Resist intense heat in fire box ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines In a Parson's turbine stage, blade velocity is 320 m/s at the mean radius and rotor blade exit angle is 30°. For minimum kinetic energy of the steam leaving the stage, the steam velocity at the exit of the rotor will be 320/3 m/s 160/3 m/s 640 m/s 640/3 m/s 320/3 m/s 160/3 m/s 640 m/s 640/3 m/s ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines In a De-Laval nozzle expanding superheated steam from 10 bar to 0.1 bar, the pressure at the minimum cross-section (i. e. pressure at throat, p₂) will be 8.2 bar 5.46 bar 9.9 bar 3.3 bar 8.2 bar 5.46 bar 9.9 bar 3.3 bar ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Relative percentage of heat absorbed through the heat transfer of (i) Furnace water wall (ii) Boiler tank (iii) Superheater (iv) Economizer (v) Air-heater of a typical boiler of 200 MW capacity would be of the order of 48 : 20 : 15 : 7 : 10 10 : 7 : 15 : 20 : 48 20 : 48 : 7 : 15 : 10 7 : 15 : 20 : 10 : 48 48 : 20 : 15 : 7 : 10 10 : 7 : 15 : 20 : 48 20 : 48 : 7 : 15 : 10 7 : 15 : 20 : 10 : 48 ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The maximum steam pressure in a Locomotive boiler is limited to 1.8 MN/m² 180 MN/m² 0.18 MN/m² 18 MN/m² 1.8 MN/m² 180 MN/m² 0.18 MN/m² 18 MN/m² ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The pressure compounded impulse turbine as compared to velocity compounded turbine require __________ number of stages. More None of these Same Less More None of these Same Less ANSWER DOWNLOAD EXAMIANS APP
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