What is the hardest working part of an HP Inkjet printer? seenagape 9 years ago What is the hardest working part of an HP Inkjet printer? A.Paper output tray B.Ink C.Print head D.Media Explanation:Reference:http://www.techradar.com/news/computing/how-an-inkjet-nozzle-fires-36-000-times-asecond-653500(5th para) ← Previous question Next question →