Apply your knowledge Module 2.

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Presentation transcript:

Apply your knowledge Module 2

1. What does MSDS stand for and what is its purpose? Answer: Material Safety Data Sheet. It is intended to provide workers and emergency personnel with procedures for handling or working with substances in a safe manner. It can usually be downloaded from Manufacturer’s site.

2. What are FRU and SRU units? Answer: Field Replaceable Units and Shop Repairable Units.

3. What is a class C Fire extinguisher? Answer: C stands for Current and it is designed for electrical equipment

4. What are the most dangerous parts of computer systems Answer: Power Supply, CRT, Printers, CD/DVD ROM, Fiber Optic Cables

5. True/False: You should wear a grounding strap when handling all computer components. Answer: False, You should not use a grounding strap when working with monitors, power supplies, laptop LCD panels, or other high-voltage components

6. What is a good humidity level for preventing ESD Answer: 70%

7. Roughly how many volts should ESD be to be felt? Answer: Around 3000 volts although ESD of 100 volts can damage electrical components

8. ESD is most likely to occur in a _____ and _____ Temperature Answer: Cool and Dry

9. What is EMI, how it is created and how to prevent it Answer: Electromagnetic Interference. It is caused by heavy machinery and motors… Use shielded twisted pair cabling as well as fiber optics.

10. What is RFI? Answer: Radio Frequency Interference affecting wifi by such devices such as wireless phone and speakers…

11. What is the difference between a power surge and a power spike? Answer: Surge is an over voltage that lasts for second whereas a spike lasts for milliseconds.

12. What is the difference between a power sag and a Brownout? Answer: a sag is an under voltage that lasts for milliseconds whereas a brownout lasts for seconds.

13. What is the difference between an online and offline UPS? Answer: Online UPS powers the connected device from a battery whereas an offline UPS powers it from the wall outlet.

14. What computing device should not (usually) be connected to a UPS? Answer: A printer. The startup of a print job requires a significant wattage which is beyond the capability of overwhelming majority of UPS systems.

15. What is the difference between a static shielded bag and a static resistant bag? Answer: Static shielded bags are usually grey color and they fully protect against ESD whereas static resistant bags are usually pink and they don’t provide the same level of ESD protection.