2. What component of the system unit is used to convert AC currents from the main supply to t different DC voltage? A. Hard Disk Drive B. Processor C. Power Supply Unit D. Motherboard 3. Which of the following is NOT a processing device? A. CPU B. ROM C. RAM D. Motherboard 4. What part of the computer system is also known as "tower" or "chassis"? A. System Unit B. Computer System C. Computer Unit D. Computer Box _ 5. What is the main internal hardware component of the system unit? A. Motherboard B. CPU C. RAM D. Computer Fan 6. What is the major storage device of the computer system that can be found inside the syst unit? A. RAM B. Hard Disk Drive C. CD/DVD ROM Drive D.PSU