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

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Compressors, Gas Turbines and Jet Engines
Pick up the false statement

Exhaust losses in gas turbine are high due to large mass flow rate
Gas turbine does not require huge quantity of water like steam plant
Gas turbine is a self starting unit
Overall efficiency of gas turbine plant is lower than that of a reciprocating engine

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