Compressors, Gas Turbines and Jet Engines An after-cooler is used to Cause moisture and oil vapour to drop out Reduce volume of air Remove impurities from air Cool the air Cause moisture and oil vapour to drop out Reduce volume of air Remove impurities from air Cool the air ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines An ideal air compressor cycle with clearance on P-V diagram can be represented by following processes Two adiabatic, one isobaric and one constant volume One adiabatic, two isobaric, and one constant volume Two adiabatic and two isobaric One adiabatic, one isobaric and two constant volumes Two adiabatic, one isobaric and one constant volume One adiabatic, two isobaric, and one constant volume Two adiabatic and two isobaric One adiabatic, one isobaric and two constant volumes ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The volume of air delivered in a medium capacity air compressor per unit time is 0.1 to 1.2 m³/s Above 5 m³/s None of these 0.15 to 5 m³/s 0.1 to 1.2 m³/s Above 5 m³/s None of these 0.15 to 5 m³/s 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 = (p₁ + p₃)/2 P₂ = Pa × p₃/p₁ p₂ = p₁. p₃ p₂ = Pa p₃/p₁ p₂ = (p₁ + p₃)/2 P₂ = Pa × p₃/p₁ p₂ = p₁. p₃ ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Volumetric efficiency of air compressors is of the order of 20 - 30% 40 - 50% 70 - 90% 60 - 70% 20 - 30% 40 - 50% 70 - 90% 60 - 70% ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The combustion efficiency of a gas turbine using perfect combustion chamber is of the order of 0.85 0.99 0.75 0.9 0.85 0.99 0.75 0.9 ANSWER DOWNLOAD EXAMIANS APP
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