Compressors, Gas Turbines and Jet Engines The overall thermal efficiency of an ideal gas turbine plant is (where r = Pressure ratio) 1 - r ɣ-1 r ɣ-1 1 - (1/r) ɣ-1/ɣ 1 - (1/r) ɣ/ɣ-1 1 - r ɣ-1 r ɣ-1 1 - (1/r) ɣ-1/ɣ 1 - (1/r) ɣ/ɣ-1 ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The volumetric efficiency of a compressor falls roughly as follows for every 100 m increase in elevation 5% 0.1% 0.5% 1.0% 5% 0.1% 0.5% 1.0% ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Reheating in gas turbine results in Decrease of thermal efficiency Both (A) and (B) above Increase of work ratio Decrease of work ratio Decrease of thermal efficiency Both (A) and (B) above Increase of work ratio Decrease of work ratio ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Axial flow compressor has the following advantage over centrifugal compressor Higher pressure ratio per stage Aerofoil blades are used Larger air handling ability per unit frontal area Higher average velocities Higher pressure ratio per stage Aerofoil blades are used Larger air handling ability per unit frontal area Higher average velocities ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The thrust on the rotor in a centrifugal compressor is produced by Radial component Axial component None of these Tangential component Radial component Axial component None of these Tangential component ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines In a single stage, single acting reciprocating air compressor, without clearance, the work-done on the air during isentropic compression is ________ the heat required to raise the temperature of air from T₁ to T₂ at a constant pressure. Greater than Less than None of these Equal to Greater than Less than None of these Equal to ANSWER DOWNLOAD EXAMIANS APP
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