Compressors, Gas Turbines and Jet Engines The thermodynamic efficiency of rotary compressor is based on Isothermal compression Polytropic compression Isentropic compression Adiabatic compression Isothermal compression Polytropic compression Isentropic compression Adiabatic compression ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The thrust on the rotor in a centrifugal compressor is produced by Axial component Tangential component Radial component None of these Axial component Tangential component Radial component None of these 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 Vt > Vo V = Uo U < Vo Vi = Vo Vt > Vo V = Uo U < Vo Vi = Vo ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The pressure ratio of an ideal vaned compressor with increase in mass flow rate Increases Remain constant First decreases and then increases Decreases Increases Remain constant First decreases and then increases Decreases ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines If p₁, is the pressure of air entering the L.P. cylinder and p₂ is the pressure of air leaving the L.P. cylinder (or inter-cooler pressure), then the ratio of cylinder diameters for a single acting, two stage reciprocating air compressor with complete intercooling is given by (where D₁ = Dia. of L.P. cylinder, and D₂ = Dia. of H.P. cylinder) None of these D₁/D₂ = p₂/p₁ D₁/D₂ = p₁ p₂ D₁/D₂ = p₁/p₂ None of these D₁/D₂ = p₂/p₁ D₁/D₂ = p₁ p₂ D₁/D₂ = p₁/p₂ ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines If the flow of air through the compressor is perpendicular to its axis, then it is a Axial flow compressor Reciprocating compressor Centrifugal compressor Turbo compressor Axial flow compressor Reciprocating compressor Centrifugal compressor Turbo compressor ANSWER DOWNLOAD EXAMIANS APP
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