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Discussion :: Compressors, Gas Turbines and Jet Engines

  1. 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)

    2. A.

     D₁/D₂ = p₁ p₂
    B.

     D₁/D₂ = p₁/p₂
    C.

     D₁/D₂ = p₂/p₁
    D.

     None of these

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    Answer : Option C

    Explanation :

    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 D₁/D₂ = p₂/p₁ where D₁ = Dia. of L.P. cylinder, D₂ = Dia. of H.P. cylinder

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