Cetane rating: A measure of the auto-ignition value of diesel fuel. It is defined as the percentage of cetane in a mixture of cetane and alpha methylnaphthalene, which has the same diesel knock characteristics as fuel under test. 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 PostCetane Next PostCheck engine light