Octane number: Octane number of any fuel is the percentage of isooctane by volume in mixture of isooctane and normal heptane which gives the same anti-knock characteristics as the fuel under standard test conditions. 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 PostNOx Next PostOil additive