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Computer Hardware - Section 5 Multiple Questions and Answers.
| 21. | Which component must be vacuumed or replaced during preventative maintenance on a laser printer? | ||
| A. | Scanning mirror | ||
| B. | Toner cartridge | ||
| C. | Ozone filter | ||
| D. | All of the above | ||
| 22. | Which controller would support an external CD-ROM drive? | ||
| A. | ESDI | ||
| B. | ARLL | ||
| C. | MFM | ||
| D. | SCSI | ||
| 24. | The DC voltage on most circuit boards is: | ||
| A. | -12 volts | ||
| B. | 0 volts | ||
| C. | +5 volts | ||
| D. | +12 volts | ||
| 25. | On a dot-matrix printer, regular lube maintenance should be followed, but this component should never be lubed: | ||
| A. | Platten bearings | ||
| B. | Carriage rails | ||
| C. | Printhead | ||
| D. | Paper advance bearings | ||
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