Compressors, Gas Turbines and Jet Engines The efficiency of jet engine is Higher at high speed Same at all altitudes Higher at high altitudes Lower at low speed Higher at high speed Same at all altitudes Higher at high altitudes Lower at low speed ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines For a two stage reciprocating compressor, compression from p₁ to p₃ is with perfect intercooling and no pressure losses. If compression in both the cylinders follows the same polytropic process and the atmospheric pressure is pa, then the intermediate pressure p₂ is given by p₂ = (p₁ + p₃)/2 p₂ = Pa p₃/p₁ P₂ = Pa × p₃/p₁ p₂ = p₁. p₃ p₂ = (p₁ + p₃)/2 p₂ = Pa p₃/p₁ P₂ = Pa × p₃/p₁ p₂ = p₁. p₃ ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The net work input required for compressor with increase in clearance volume Remains same Increases Increases/decreases depending on compressor capacity Decreases Remains same Increases Increases/decreases depending on compressor capacity Decreases ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Mechanical efficiency of gas turbines as compared to I.C engines is Lower Higher None of these Same Lower Higher None of these Same ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines A large clearance volume in a reciprocating compressor results in Reduced volume flow rate Increased volume flow rate Lower delivery pressure Lower suction pressure Reduced volume flow rate Increased volume flow rate Lower delivery pressure Lower suction pressure 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 0.001 0.01 0.005 0.05 0.001 0.01 0.005 0.05 ANSWER DOWNLOAD EXAMIANS APP
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