Wheel cylinder or Slave cylinder: A cylinder mounted on each wheel, whereby pressurized fluid from master cylinder applies braking force on the brake shoes in drum brakes ; also called slave cylinder. 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 PostWheel base Next PostWheel track