Compressors, Gas Turbines and Jet Engines In jet engines, for the efficient production of large power, fuel is burnt in an atmosphere of Atmospheric air Oxygen alone Compressed air Vacuum Atmospheric air Oxygen alone Compressed air Vacuum ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Pressure ratio in gas turbines is the ratio of Highest pressure to exhaust pressure Inlet pressure to exhaust pressure Compressor pressure ratio Pressures across the turbine Highest pressure to exhaust pressure Inlet pressure to exhaust pressure Compressor pressure ratio Pressures across the turbine ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines For a two stage compressor, if index of compression for higher stage is greater than index of compression for lower stage, then the optimum pressure as compared to ideal case will Remain unaffected Decrease Other factors control it Increase Remain unaffected Decrease Other factors control it Increase ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The overall efficiency of the compressed air system is the Product of shaft output of air motor and shaft input to the compressor Ratio of shaft output of the air motor to the shaft input to the compressor None of these Ratio of shaft input to the compressor to the shaft output of air motor Product of shaft output of air motor and shaft input to the compressor Ratio of shaft output of the air motor to the shaft input to the compressor None of these Ratio of shaft input to the compressor to the shaft output of air motor ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The compressor efficiency is the Total output/air input Isothermal H.P./shaft H.R Compression work/motor input Isothermal H.P/indicated H.R Total output/air input Isothermal H.P./shaft H.R Compression work/motor input Isothermal H.P/indicated H.R ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Water gas is produced by Carbonisation of coal Passing air and a large amount of steam over waste coal at about 65°C Partial combustion of coal, eke, anthracite coal or charcoal in a mixed air steam blast Passing steam over incandescent coke Carbonisation of coal Passing air and a large amount of steam over waste coal at about 65°C Partial combustion of coal, eke, anthracite coal or charcoal in a mixed air steam blast Passing steam over incandescent coke ANSWER DOWNLOAD EXAMIANS APP
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