Quench area: The area of the flat surface of the piston crown that opposes the flat surface of the cylinder head as the piston approaches TDC. 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 PostPush rod Next PostRadial engine