Compressors, Gas Turbines and Jet Engines
The indicated work per unit mass of air delivered is

Directly proportional to clearance volume
Greatly affected by clearance volume
Inversely proportional to clearance volume
Not affected by clearance volume

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

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Compressors, Gas Turbines and Jet Engines
Inter-cooling in gas turbine results in

Decrease in both thermal efficiency and net output
Increase in both thermal efficiency and net output
Increase in thermal efficiency but decrease in net output
Increase in net output but decrease in thermal efficiency

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