Compressors, Gas Turbines and Jet Engines Mechanical efficiency of gas turbines as compared to I.C engines is Higher None of these Lower Same Higher None of these Lower Same ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The work-done on a compressor will be minimum if air is taken from A source of low temperature air The atmosphere A source at 0° C A source of high temperature air A source of low temperature air The atmosphere A source at 0° C A source of high temperature air ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The following is true for an open cycle gas turbine having exhaust heat exchanger. Atmospheric air before entering the compressor is Compressed air before entering the combustion chamber is heated Exhaust gases drive the compressor Bled gas from turbine is heated and readmitted for complete expansion Heated Compressed air before entering the combustion chamber is heated Exhaust gases drive the compressor Bled gas from turbine is heated and readmitted for complete expansion Heated 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 Work ratio of a gas turbine may be improved by Decreasing the compression work Increasing the compression work Both (A) and (C) above Increasing the turbine work Decreasing the compression work Increasing the compression work Both (A) and (C) above Increasing the turbine work ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The most efficient method of compressing air is to compress it Isochronically Isentropically Isothermally Adiabatically Isochronically Isentropically Isothermally Adiabatically ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS