Compressors, Gas Turbines and Jet Engines Ram compression in turbojet involves Reduction of speed of incoming air and conversion of part of it into pressure energy Lost work Compression of inlet air Increasing speed of incoming air Reduction of speed of incoming air and conversion of part of it into pressure energy Lost work Compression of inlet air Increasing speed of incoming air ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The thermal efficiency of a simple gas turbine for a given turbine inlet temperature with increase in pressure ratio First decreases and then increases First increases and then decreases Increases Decreases First decreases and then increases First increases and then decreases Increases Decreases 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 0.9 0.75 0.85 0.99 0.9 0.75 0.85 0.99 ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines In a jet propulsion unit, the products of combustion after passing through the gas turbine are discharged into Discharge nozzle Back to the compressor Atmosphere Vacuum Discharge nozzle Back to the compressor Atmosphere Vacuum ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The volumetric efficiency of a compressor falls roughly as follows for every 5°C increase in atmospheric temperature 0.05 0.01 0.005 0.001 0.05 0.01 0.005 0.001 ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines For speed above 3000 km/hour, it is more advantageous to use Propellers Turbojet engine Ramjet engine Rockets Propellers Turbojet engine Ramjet engine Rockets ANSWER DOWNLOAD EXAMIANS APP
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