Compressors, Gas Turbines and Jet Engines When air is to be compressed at a high pressure, then it is advantageous to use None of these Single stage compression Multistage compression with intercooling Multistage compression without intercooling None of these Single stage compression Multistage compression with intercooling Multistage compression without intercooling ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines An ideal air compressor cycle without clearance on P-V diagram can be represented by following processes One adiabatic, two isobaric, and one constant volume Two adiabatic and two isobaric Two adiabatic, one isobaric and one constant volume One adiabatic, one isobaric and two constant volumes One adiabatic, two isobaric, and one constant volume Two adiabatic and two isobaric Two adiabatic, one isobaric and one constant volume One adiabatic, one isobaric and two constant volumes ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines In jet engines, paraffin is usually used as the fuel because of its Low freezing point Ease of atomisation High calorific value Both (A) and (C) above Low freezing point Ease of atomisation High calorific value Both (A) and (C) above 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 If V, U and Vr represent the absolute velocity of fluid, velocity of blade, and relative velocity of fluid, and suffix ‘I’ and ‘o’ stand for entry and exit conditions, then in a rotary machine whose degree of reaction is unity U < Vo V = Uo Vt > Vo Vi = Vo U < Vo V = Uo Vt > Vo Vi = Vo ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Ratio of indicated H.P. and brake H.P. is known as Mechanical efficiency Isothermal efficiency Adiabatic efficiency Volumetric efficiency Mechanical efficiency Isothermal efficiency Adiabatic efficiency Volumetric efficiency ANSWER DOWNLOAD EXAMIANS APP
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