Compressors, Gas Turbines and Jet Engines When air is to be compressed at a high pressure, then it is advantageous to use Single stage compression None of these Multistage compression without intercooling Multistage compression with intercooling Single stage compression None of these Multistage compression without intercooling Multistage compression with intercooling ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines In gas turbines, high thermal efficiency is obtained in Closed cycle & Open cycle Closed cycle Open cycle Closed/open depending on other considerations Closed cycle & Open cycle Closed cycle Open cycle Closed/open depending on other considerations ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The volumetric efficiency of a compressor falls roughly as follows for every 100 m increase in elevation 0.1% 1.0% 5% 0.5% 0.1% 1.0% 5% 0.5% ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Pressure ratio in gas turbines is the ratio of Highest pressure to exhaust pressure Pressures across the turbine Inlet pressure to exhaust pressure Compressor pressure ratio Highest pressure to exhaust pressure Pressures across the turbine Inlet pressure to exhaust pressure Compressor pressure ratio ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The inter-cooler pressure, for minimum work required, for a two stage reciprocating air compressor, is given by (where p₁ = Intake pressure of air, p₂ = Inter-cooler pressure, and p₃ = Delivery pressure of air) p₂ = p₁ × p₂ p₂ = p₃/p₁ p₂ = p₁/p₃ p₂ = p₁ × p₃ p₂ = p₁ × p₂ p₂ = p₃/p₁ p₂ = p₁/p₃ p₂ = p₁ × p₃ ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The compressor performance at higher altitude compared to sea level will be Dependent on other factors Lower Higher Same Dependent on other factors Lower Higher Same ANSWER DOWNLOAD EXAMIANS APP
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