Compressors, Gas Turbines and Jet Engines The ratio of the indicated power to the shaft power or brake power of the motor or engine required to drive the compressor, is called Mechanical efficiency Volumetric efficiency Isothermal efficiency Compressor efficiency Mechanical efficiency Volumetric efficiency Isothermal efficiency Compressor efficiency ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The pressure ratio for an open cycle gas turbine compared to closed cycle gas turbine of same h.p. is Low High Same Low/high depending on make and type Low High Same Low/high depending on make and type ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Cylinder clearance in a compressor should be About 50% of swept volume About 100% of swept volume As large as possible As small as possible About 50% of swept volume About 100% of swept volume As large as possible As small as possible ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines For speed above 3000 km/hour, it is more advantageous to use Turbojet engine Rockets Ramjet engine Propellers Turbojet engine Rockets Ramjet engine Propellers ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The combustion efficiency of a gas turbine using perfect combustion chamber is of the order of 0.75 0.99 0.85 0.9 0.75 0.99 0.85 0.9 ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines For minimum work in multistage compression, assuming same index of compression in all stages Work done in subsequent stages should increase Work done in first stage should be more Work done in subsequent stages should decrease Work done in all stages should be equal Work done in subsequent stages should increase Work done in first stage should be more Work done in subsequent stages should decrease Work done in all stages should be equal ANSWER DOWNLOAD EXAMIANS APP
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