CompTIA A+® Certification All-In-One For Dummies®, 2nd Edition

5.10. Answers

1. B, C. Continuous form feed and friction feed are the two types of paper feeder mechanisms. Dot matrix printers use continuous form feed, and laser printers use friction feed. See "Learning about Paper Feeder Mechanisms".

2. A, B. Friction feeders use rollers that apply pressure and friction to the top sheet of paper in the paper tray to move it into the print device. Laser printers and fax machines use friction feed. Review "Friction feeders".

3. D. The transfer corona, also known as the secondary corona wire, charges the paper with a +600V charge. Check out "The laser printing process".

4. C. The print drum is charged with an initial −600V charge. The laser writes the image onto the print drum by weakening the charge to −100V in areas that create the image. This causes the toner to attract to the −100V areas because the toner is approximately −600V — and opposites attract! Peruse "The laser printing process".

5. D. The developer roller and the print drum are both equally charged so that they are repelled from one another. The toner on the developer roller will be attracted to neutralized areas of the print drum caused by the laser. Take a look at "The laser printing process".

6. A. The transfer corona charges the paper to +600V, so the toner on the print drum is strongly attracted to it. Peek at "The laser printing process".

7. B. An inkjet printer sprays the ink onto the paper. Look over "Inkjet printers".

8. B. Within the ink cartridge, a heating element vaporizes the ink, forcing it to ...