Compressors, Gas Turbines and Jet Engines A closed gas turbine in which fuel is burnt directly in the air is not possible because of High friction losses High specific volume Increasing gas temperature Paucity of O2 High friction losses High specific volume Increasing gas temperature Paucity of O2 ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Ram compression in turbojet involves Increasing speed of incoming air Compression of inlet air Reduction of speed of incoming air and conversion of part of it into pressure energy Lost work Increasing speed of incoming air Compression of inlet air Reduction of speed of incoming air and conversion of part of it into pressure energy Lost work ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Reheating in a gas turbine Increases the turbine work Increases the thermal efficiency Decreases the thermal efficiency Increases the compressor work Increases the turbine work Increases the thermal efficiency Decreases the thermal efficiency Increases the compressor work ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The area of actual indicator diagram on an air compressor as compared to area of ideal indicator diagram is More/less depending on compressor capacity Same Less More More/less depending on compressor capacity Same Less More ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines A machine used to raise the pressure of air is called I.C engine Gas turbine Compressor Air motor I.C engine Gas turbine Compressor Air motor ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Volumetric efficiency of air compressors is of the order of 20 - 30% 40 - 50% 70 - 90% 60 - 70% 20 - 30% 40 - 50% 70 - 90% 60 - 70% ANSWER DOWNLOAD EXAMIANS APP
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