The ------- should be kept in 'off ' position while rotating drum for spreading inkAImpression rollerBOperating leverCSilk carrierDMargin adjusting knobsAnswer: B. Operating lever Read Explanation: The Operating lever should be kept in 'off ' position while rotating drum for spreading inkoperating lever is otherwise called impression lever or Off/On lever or pressure lever. The Operating lever should be kept in the ‘ON’ position when copies are taken. The operating lever should be kept in the ‘OFF’ position when the duplicator is not in use. Read more in App