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)

D₁/D₂ = p₁/p₂
D₁/D₂ = p₂/p₁
None of these
D₁/D₂ = p₁ p₂

ANSWER DOWNLOAD EXAMIANS APP

Compressors, Gas Turbines and Jet Engines
The degree of reaction in an axial flow compressor is defined as the ratio of static enthalpy rise in the

Stator to static enthalpy rise in the stage
Rotor to static enthalpy rise in the stator
Rotor to static enthalpy rise in the stage
Stator to static enthalpy rise in the rotor

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

Two adiabatic, one isobaric and one constant volume
One adiabatic, one isobaric and two constant volumes
Two adiabatic and two isobaric
One adiabatic, two isobaric, and one constant volume

ANSWER DOWNLOAD EXAMIANS APP

Compressors, Gas Turbines and Jet Engines
Intercooling in gas turbines

Increases net output but decreases thermal efficiency
Decreases net output and thermal efficiency both
Decreases net output but increases thermal efficiency
Increases net output and thermal efficiency both

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Compressors, Gas Turbines and Jet Engines