Compressors, Gas Turbines and Jet Engines The air-fuel ratio in gas turbines is of the order of 15: 1 7: 1 50: 1. 30: 1 15: 1 7: 1 50: 1. 30: 1 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 P₂ = Pa × p₃/p₁ p₂ = Pa p₃/p₁ p₂ = (p₁ + p₃)/2 p₂ = p₁. p₃ P₂ = Pa × p₃/p₁ p₂ = Pa p₃/p₁ p₂ = (p₁ + p₃)/2 ANSWER DOWNLOAD EXAMIANS APP
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 Decrease None of these Increase Remain same Decrease None of these Increase 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 0.05 0.005 0.001 0.01 0.05 0.005 0.001 0.01 ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Cylinder clearance in a compressor should be About 100% of swept volume As small as possible As large as possible About 50% of swept volume About 100% of swept volume As small as possible As large as possible About 50% of swept volume ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The compressed air may be used In starting and supercharging of I.C. engines All of the listed here For operating pneumatic drills In gas turbine plants In starting and supercharging of I.C. engines All of the listed here For operating pneumatic drills In gas turbine plants ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS