Compressors, Gas Turbines and Jet Engines Maximum delivery pressure is a rotary air compressor is of the order of 25 kg/cm² 10 kg/cm² 6 kg/cm² 16 kg/cm² 25 kg/cm² 10 kg/cm² 6 kg/cm² 16 kg/cm² ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines A gas turbine used in air craft should have Small frontal area and high h.p. High speed and high h.p. Low weight and small frontal area High h.p. and low weight Small frontal area and high h.p. High speed and high h.p. Low weight and small frontal area High h.p. and low weight 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 = (p₃/p₁)1/4 D₁/D₂ = (p₁ p₃)1/2 D₁/D₂ = (p₁ p₃)1/4 D₁/D₂ = (p₁/p₃)1/4 D₁/D₂ = (p₃/p₁)1/4 D₁/D₂ = (p₁ p₃)1/2 D₁/D₂ = (p₁ p₃)1/4 D₁/D₂ = (p₁/p₃)1/4 ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The compressor efficiency is the Isothermal H.P./shaft H.R Total output/air input Isothermal H.P/indicated H.R Compression work/motor input Isothermal H.P./shaft H.R Total output/air input Isothermal H.P/indicated H.R Compression work/motor input 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 all stages should be equal Work done in subsequent stages should decrease Work done in first stage should be more Work done in subsequent stages should increase Work done in all stages should be equal Work done in subsequent stages should decrease Work done in first stage should be more Work done in subsequent stages should increase ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Actual compression curve is Better than isothermal and adiabatic Same as isothermal Same as adiabatic In between isothermal and adiabatic Better than isothermal and adiabatic Same as isothermal Same as adiabatic In between isothermal and adiabatic ANSWER DOWNLOAD EXAMIANS APP
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