Compressors Gas dynamics and Gas Turbines MCQ with Answers

Compressors Gas dynamics and Gas Turbines MCQ with Answers

41) An aftercooler is used to

Answer is:

cause moisture and oil vapour to drop out

42) High air-fuel ratio in gas turbines

Answer is:

reduces exhaust temperature

43) The ratio of the volume of free air delivery per stroke to the swept volume of the piston, is known as

Answer is:

volumetric efficiency

44) 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 intercooler pressure), then the ratio of cylinder diameters for a single acting, two stage reciprocatin

Answer is:

D₁/D₂ = p₂/p₁

45) The ratio of the indicated power to the shaft power or brake power of the motor or engine required to drive the compressor, is called

Answer is:

mechanical efficiency

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