Compressors, Gas Turbines and Jet Engines In jet engines, for the efficient production of large power, fuel is burnt in an atmosphere of Oxygen alone Atmospheric air Vacuum Compressed air Oxygen alone Atmospheric air Vacuum Compressed air ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Rotary compressor is best suited for Small quantity of air at high pressure Large quantity of air at low pressure Large quantity of air at high pressure Small quantity of air at low pressure Small quantity of air at high pressure Large quantity of air at low pressure Large quantity of air at high pressure Small quantity of air at low pressure ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines If p₁ is the pressure of air entering the L.P, cylinder and p₃ is the pressure of air leaving the H.P. cylinder, then the ratio of cylinder diameters for a single acting, two stage reciprocating compressor with complete intercooling is given by D₁/D₂ = (p₁ p₃)1/2 D₁/D₂ = (p₁/p₃)1/4 D₁/D₂ = (p₃/p₁)1/4 D₁/D₂ = (p₁ p₃)1/4 D₁/D₂ = (p₁ p₃)1/2 D₁/D₂ = (p₁/p₃)1/4 D₁/D₂ = (p₃/p₁)1/4 D₁/D₂ = (p₁ p₃)1/4 ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Volumetric efficiency of air compressors is of the order of 70 - 90% 20 - 30% 60 - 70% 40 - 50% 70 - 90% 20 - 30% 60 - 70% 40 - 50% ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Isothermal compression though most efficient, but is not practicable because It requires very big cylinder It is impossible in practice It does not increase pressure much Compressor has to run at very slow speed to achieve it It requires very big cylinder It is impossible in practice It does not increase pressure much Compressor has to run at very slow speed to achieve it ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The gas in cooling chamber of a closed cycle gas turbine is cooled at None of the listed here Constant temperature Constant volume Constant pressure None of the listed here Constant temperature Constant volume Constant pressure ANSWER DOWNLOAD EXAMIANS APP
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