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Which type of turbochargers use moveable vanes to adjust air-flow?(a) Variable compressor(b) Variable- geometry(c) Variable-nozzle(d) Variable-nozzle or Variable-geometryI had been asked this question during an interview.My question is based upon Petrol Engine Fuel Supply System in section Exhaust System & Petrol Engine Fuel Supply System of Automotive Engine Design

Answer» CORRECT choice is (d) Variable-nozzle or Variable-geometry

For explanation I WOULD say: Variable-geometry or variable-nozzle turbochargers use moveable VANES to adjust the air-flow to the TURBINE, imitating a turbocharger of the optimal size throughout the power curve.


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