Compressors, Gas Turbines and Jet Engines There is a certain pressure ratio (optimum) for a gas turbine at which its thermal efficiency is maximum. With increase in turbine temperature, the value of pressure ratio for the peak efficiency would Remain same Increase None of these Decrease Remain same Increase None of these Decrease ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Ratio of indicated H.P. and brake H.P. is known as Isothermal efficiency Adiabatic efficiency Mechanical efficiency Volumetric efficiency Isothermal efficiency Adiabatic efficiency Mechanical efficiency Volumetric efficiency ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Compression efficiency is compared against Isothermal compression Adiabatic compression Ideal compression Isentropic compression Isothermal compression Adiabatic compression Ideal compression Isentropic compression 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 = 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 p₂ = (p₁ + p₃)/2 ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines In a centrifugal compressor, the ratio of the ________ to the blade velocity is called slip factor. Outlet whirl velocity Inlet whirl velocity Outlet velocity of flow Inlet velocity of flow Outlet whirl velocity Inlet whirl velocity Outlet velocity of flow Inlet velocity of flow ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Mechanical efficiency of gas turbines as compared to I.C engines is Higher Same None of these Lower Higher Same None of these Lower ANSWER DOWNLOAD EXAMIANS APP
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