Steam Boilers, Engines, Nozzles and Turbines The maximum efficiency of a De-Laval turbine is (where α = Nozzle angle) cot²α cos²α tan²α sin²α cot²α cos²α tan²α sin²α 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) T1 /176.5H T1 /88.25H 88.25H/T1 176.5H/T1 T1 /176.5H T1 /88.25H 88.25H/T1 176.5H/T1 ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The saturation temperature of steam with increase in pressure increases Linearly Rapidly first and then slowly Slowly first and then rapidly Inversely Linearly Rapidly first and then slowly Slowly first and then rapidly Inversely ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines At critical point, i.e. p=225.65 kg/cm², the latent enthalpy of vaporisation is Minimum Depends on temperature also Maximum Zero Minimum Depends on temperature also Maximum Zero ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The critical pressure gives the velocity of steam at the throat None of these Less than the velocity of sound Equal to the velocity of sound More than the velocity of sound None of these Less than the velocity of sound Equal to the velocity of sound More than the velocity of sound ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The compounding of turbines is done in order to Improve efficiency Reduce exit losses Reduce speed of rotor All of these Improve efficiency Reduce exit losses Reduce speed of rotor All of these ANSWER DOWNLOAD EXAMIANS APP