Double Overhead Camshaft ( DOHC): The engine has two camshafts mounted in one cylinder head. One camshaft operates the intake valves, while the other operates the exhaust valves. 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 PostDoping Next PostDwell