Compressors, Gas Turbines and Jet Engines The specific output per kg mass flow rate of a gas turbine (having fixed efficiencies of compressor and turbine and fixed higher and lower temperature) with increase in pressure ratio will First increase, reach maximum and then decrease Increase first at fast rate and then slow Decrease continuously Increase first at slow rate and then fast First increase, reach maximum and then decrease Increase first at fast rate and then slow Decrease continuously Increase first at slow rate and then fast ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The overall thermal efficiency of an ideal gas turbine plant is (where r = Pressure ratio) 1 - (1/r) ɣ-1/ɣ r ɣ-1 1 - (1/r) ɣ/ɣ-1 1 - r ɣ-1 1 - (1/r) ɣ-1/ɣ r ɣ-1 1 - (1/r) ɣ/ɣ-1 1 - r ɣ-1 ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Gas turbine blades are given a rake Equal to zero Depending on the velocity In the direction of motion of blades Opposite to the direction of motion of blades Equal to zero Depending on the velocity In the direction of motion of blades Opposite to the direction of motion of blades ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines A rocket engine for the combustion of its fuel Does not require oxygen Carries its own oxygen Uses surrounding air Uses compressed atmospheric air Does not require oxygen Carries its own oxygen Uses surrounding air Uses compressed atmospheric air ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Maximum temperature in a gas turbine is of the order of 2000°C 1000°C 1500°C 700°C 2000°C 1000°C 1500°C 700°C ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines A centrifugal compressor works on the principle of Generating pressure directly Centripetal action Conversion of kinetic energy into pressure energy Conversion of pressure energy into kinetic energy Generating pressure directly Centripetal action Conversion of kinetic energy into pressure energy Conversion of pressure energy into kinetic energy ANSWER DOWNLOAD EXAMIANS APP
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