Volumetric Efficiency: Volumetric Efficiency of an engine is the ratio of the volume of the air actually inducted in a given time at the atmospheric conditions surrounding the engine, to the total piston displacement or swept volume of the engine. Related posts: Personnel Management Operative Functions Administrative Role of PM Competency HR Management Role Change Personnel Policies Personnel Procedures Appealed Policies Implied Policies Specific Policies Personnel records Research Pure research Personnel research Attitude or Opinion Survey Turnover Secondary research Applied research Personnel audit Read more articles Previous PostViscosity Next PostWankel engine