Steam Boilers, Engines, Nozzles and Turbines Hard coke is produced by carburization of coal at 950-1100°C 500-600°C Atmospheric temperature 700-850°C 950-1100°C 500-600°C Atmospheric temperature 700-850°C ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The latent heat of steam with increase of pressure Decreases Remain same Increases Behaves unpredictably Decreases Remain same Increases Behaves unpredictably ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The draught (in mm of water), for maximum discharge of flue gases through the chimney, is given by (where H = Height of the chimney in meters, and T1 = Absolute temperature of air outside the chimney in K) 176.5H/T1 T1 /88.25H T1 /176.5H 88.25H/T1 176.5H/T1 T1 /88.25H T1 /176.5H 88.25H/T1 ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The function of injector used in small capacity boilers is to Add make up water in the system Inject chemical solution in feed pump Pump water, similar to boiler feed pump Create vacuum Add make up water in the system Inject chemical solution in feed pump Pump water, similar to boiler feed pump Create vacuum 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 160/3 m/s 320/3 m/s 640 m/s 640/3 m/s 160/3 m/s 320/3 m/s 640 m/s 640/3 m/s ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The crown of the fire box is made hemispherical in order to Resist intense heat in fire box Withstand pressure inside boiler Give maximum space Give maximum strength Resist intense heat in fire box Withstand pressure inside boiler Give maximum space Give maximum strength ANSWER DOWNLOAD EXAMIANS APP
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