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Grounding it to a wall outlet does nothing; there is a grayish-black coating on the outside bell of the CRT (called Aquadag) and you will notice some type of metal spring or finger touching it - THIS is what you want to ground the wire to. But even more important the CRT is made of glass and it contains an extremely high vacuum. If it breaks it will implode and glass will go flying everywhere. I strongly recommend at least wearing safety glasses before handling it. I have been working with CRTs since I was about 10 years old (1970) and the points raised are all very valid. I illustrate the fact that it can be worked on safely - even by a kid - but if you read this and do not feel comfortable with this, please, don't touch it and leave it to qualified personel. The second anode connection on the side of the bell is the high voltage connection. In ALL cases make sure it is not plugged in! After carefully removing the cover, you should be aware of exactly what you are trying to discharge. A capacitor is nothing more than two conductors separated by an insulator, so yes, even a line cord or a network cable and a line cord also have capacitance (and inductance, but that is another story). There are no high voltage capacitors as such - the aquadag coating of the CRT forms a capacitor. The inside of the CRT bell (silver) is one plate, the glass of the CRT is the insulator, or dielectric, and the thick black coating on the outside is the other plate and it is normally grounded, whether you have a TV, monitor, eMac or iMac, regardless of who made it, There will be something making contact with the outer aquadag - it could be a coil spring, a flat leaf spring, a clamp or some type of metal comtacting it, this is the proper place to ground it. Attach a wite to this point and the other end to a flat blade screwdriver. Work the screwdriver under the lip of the rubber cup on the side, You'll hear a snap and a spark when ot arcs, but go further untierl you actually touch the metal connecton. If you need to disconnect this you can lift the edge of the cup and see how that is done. Usually you push it in slightly and push it to one side and und unhook it. Then touch the button on the side of the CRT with the screwdriver once again, just to make sure, But that does not eliminate al the dangers! Two other things you need to be aware of. As already stated, the CRT is made of glass and it is fragile. It is under a very high vacuum and if broken it will implode and send broken glass everywhere. If you have to handle the CRT, and / or disconnect the deflection yoke and / or the gun connector, please treat them with care. So now you have the CRT discharged and safely set aside. All is safe now, right? Not necessarily. Granted, the second anode is the high voltage, but there also is several hundred volts on the electron gun and deflection yoke, with it unplugged you probably won't have any voltage there, but there are capacitors in the power supply, and you could get an unexpected shock. Usually the circuitry will discharge by itself within a half hour, but that depends on the circuit design. DO NOT try to discharge the CRT to earth ground! You are not completing the circuit and actually creating a more dangerous situation than you started with. The ONLY safe place to discharge it is by electrically connecting the inner and outer aquadag - because that is actually where the voltage is stored.
Also check :FREE ENVATO ELEMENT ACCOUNT HERE 1. Match the RAID technology terms to the description. (Not all options are used.) IT Essentials (Version 7.00) – IT Essentials 7.0 Chapter 3 exam 2. Which two considerations would be of the greatest importance when building a workstation that will run multiple virtual machines? (Choose two.)
Explanation:Virtual computing requires more powerful hardware configurations because each installation needs its own resources and thus requires a lot of RAM and CPU processing power. 3. Which two components are commonly replaced when a computer system with a newer motherboard is being upgraded? (Choose two.)
Explanation:When a motherboard is being upgraded to a newer version, both the CPU and RAM are commonly upgraded to support the motherboard compatibility requirements. 4. What are two reasons for installing a second hard disk drive inside an existing computer? (Choose two.)
Explanation:The common reasons to install a second hard disk drive in a computer include: 1) increase storage space, 2) increase hard drive speed, 3) install a second operating system, 4) store the system swap file, 5) provide fault tolerance, and 6) backup the original hard drive. 5. A technician has just finished assembling a new computer. When the computer is powered up for the first time, the POST discovers a problem. How does the POST indicate the error?
6. What is a function of the BIOS?
7. A technician has assembled a new computer and must now configure the BIOS. At which point must a key be pressed to start the BIOS setup program?
Explanation:To enter the BIOS setup program, you must press the proper key or key sequence during POST. Many motherboards will display graphics while the computer is checking hardware and waiting for the proper key press for the user to enter the BIOS. 8. How does an inline UPS protect computer equipment against electrical power brownouts and blackouts?
Explanation:Uninterruptible power supplies (UPS) contain a battery which is constantly providing a consistent level of voltage to the computer. 9. Which condition refers to a reduced voltage level of AC power that lasts for an extended period of time? Explanation:Surges and spikes are increased voltage levels. A sag is a short duration reduction in line voltage while a brownout is a reduction in voltage that occurs for an extended period of time. 10. How should a technician dispose of an empty inkjet printer cartridge?
Explanation:Refilling used inkjet cartridges is not recommended, as it may void the printer warranty and could leak ink, damaging the printer. Printer cartridges should be recycled, following the procedures established for recycling by the manufacturer. Because they are an environmental hazard, they should never be thrown away. 11. What makes CRT monitor disposal dangerous for a technician who is handling the disposal?
Explanation:CRT monitors do contain lead, barium, and rare earth metals that can be dangerous to the environment if not disposed of properly, but the danger to the technician is in the high voltage levels that can be stored even after powering off the monitor and disconnecting the power cord. A technician might be disposing of a CRT monitor that has the cover ajar or removed and be exposed to the high voltage. 12. Which type of interface was originally developed for high-definition televisions and is also popular to use with computers to connect audio and video devices?
Explanation:High definition multimedia interface, or HDMI, was originally a television standard. However, because it has many digital features, it is also a popular interface to connect audio and video devices to computers. 13. What is indicated by the contrast ratio of a monitor?
Explanation:Contrast ratio is one of many factors that is used to describe the resolution of a monitor. Contrast ratio is a measure of the difference in intensity between white and black areas of the picture. A higher contrast ratio means the monitor can produce pictures with brighter whites and darker blacks. 14. What electrical unit refers to the number of electrons moving through a circuit per second?
Explanation:Current refers to the amount of electrons moving through a circuit per second and is measured in amperes or amps. 15. What characteristic of electricity is expressed in watts?
Explanation:Watts is the unit used to measure the electrical power. Power refers to the work required to move electrons through a circuit multiplied by the number of electrons flowing through a circuit per second. 16. Which is a BIOS security feature that can prevent data from being read from a hard drive even if the hard drive is moved to another computer?
Explanation:There are several commonly available BIOS security features. Drive encryption is used to encrypt hard drives to prevent data access. Secure boot ensures that devices will only boot a trusted operating system. BIOS passwords allow different levels of BIOS access. RAID is not a BIOS security feature but rather provides redundancy and fault tolerance by using multiple hard drives. 17. What data is stored in the CMOS memory chip?
Explanation:The complementary metal-oxide semiconductor (CMOS) chip is a small memory chip located on the motherboard that is used to store saved BIOS settings. 18. What is the purpose of LoJack?
Explanation:The LoJack security feature protects against data theft if a device is stolen by allowing the owner to locate, lock, or delete all files on the device. 19. What is one purpose of adjusting the clock speed within the BIOS configuration settings?
Explanation:The CPU clock speed can be adjusted up or down within the BIOS configuration settings. By lowering the clock speed, a CPU can run slower and cooler. Increasing the CPU clock speed makes the computer run faster and hotter. 20. A user playing a game on a gaming PC with a standard EIDE 5400 RPM hard drive finds the performance unsatisfactory. Which hard drive upgrade would improve performance while providing more reliability and more energy efficiency?
Explanation:Games require a lot of storage. In order for the computer to load and run games quickly, a fast hard drive will need to be installed. To obtain best performance an SSD (Solid-State Drive) will perform faster than an EIDE drive or a SATA drive. 21. Which security feature in modern CPUs protects memory areas that contain part of the operating system from malware attacks?
Explanation:The execute disable option can be turned on, if the feature is supported by the OS, to prevent malicious code from being executed inside a specific memory area that contains operating system files. 22. A user reports that every morning when a particular computer is turned on, the configuration settings on that computer have to be reset. What action should be taken to remedy this situation?
Explanation:BIOS information is maintained through the use of a CMOS battery. If the CMOS battery no longer provides power, configuration settings may be lost. 23. A data analyst has asked a technician to help protect locally stored data by installing a RAID. What is the minimum number of drives the technician has to install if configuring a RAID level 6? 24. A data analyst has asked a technician to help protect locally stored data by installing a RAID. What is the minimum number of drives the technician has to install if configuring a RAID level 10? 25. A data analyst has asked a technician to help protect locally stored data by installing a RAID. What is the minimum number of drives the technician has to install if configuring a RAID level 10? 26. A data analyst has asked a technician to help protect locally stored data by installing a RAID. What is the minimum number of drives the technician has to install if configuring a RAID level 1? 27. A data analyst has asked a technician to help protect locally stored data by installing a RAID. What is the minimum number of drives the technician has to install if configuring a RAID level 5? 31. A data analyst has asked a technician to help protect locally stored data by installing a RAID. What is the minimum number of drives the technician has to install if configuring a RAID level 10? 32. A data analyst has asked a technician to help protect locally stored data by installing a RAID. What is the minimum number of drives the technician has to install if configuring a RAID level 1? 33. A technician has been asked to configure several computers with RAID. The customer needs protection if one drive fails, fast access, and drive capacity. Which RAID should the technician install?
34. A technician has been asked to configure several computers with RAID. The customer needs protection if two drive fails and wants as much drive capacity as possible. Which RAID should the technician install?
35. A technician has been asked to configure several computers with RAID. The customer needs protection if two drive fails and wants as much drive capacity as possible. Which RAID should the technician install?
36. A technician has been asked to configure several computers with RAID. The customer needs protection for one drive failure and only has room in the computer for two drives. Which RAID should the technician install?
37. A technician has been asked to configure several computers with RAID. The customer wants RAID and full drive capacity, but does not care about a drive failure, because all data is constantly backed up. The computer where the RAID is to be installed only has room for two drives. Which RAID should the technician install?
38. A technician has been asked to configure several computers with RAID. The customer wants data to be stored on two drives that are used to maximum capacity and does not care if a single drive fails, because data is backed up hourly. Which RAID should the technician install?
39. A technician has been asked to configure several computers with RAID. The customer wants data to be stored on three drives and protection for one drive failure. Which RAID should the technician install?
40. A technician has been asked to configure several computers with RAID. The customer wants three drives to be used and protection if one drive fails. Which RAID should the technician install?
41. A technician has been asked to configure several computers with RAID. The customer wants to incorporate mirroring and striping as part of the RAID. Which RAID should the technician install?
42. A technician has been asked to configure several computers with RAID. The customer wants the best RAID possible with three drives used. Which RAID should the technician install?
43. A technician is selecting a PC that will be used by a user as a thin client. What is a major consideration that needs to be taken into account?
44. A technician is selecting a web server that will be used to host multiple gaming applications. What is a major consideration that needs to be taken into account?
46. A technician is selecting a PC that will be used by a songwriter to mix tracks. What is a major consideration that needs to be taken into account?
47. A technician is selecting a laptop that will be used by a teleworker for connecting to the internet while traveling anywhere. What is a major consideration that needs to be taken into account?
48. A technician is selecting a server that will be used by a cloud provider for data storage. What is a major consideration that needs to be taken into account?
49. A technician is selecting a server that will be used by a cloud provider to provide fault tolerance for large quantities of stored data. What is a major consideration that needs to be taken into account?
51. A technician is selecting a PC that will be used by an employee who wants to share a keyboard and mouse among three devices. What is a major consideration that needs to be taken into account?
52. A technician is selecting a PC that will be used by an employee who wants to share a keyboard and mouse among three devices. What is a major consideration that needs to be taken into account?
1. When a computer is being assembled, which action can be taken to help eliminate cable clutter within a computer case?
2. What is the best way to apply thermal compound when reseating a CPU?
3. A technician is installing additional memory in a computer. How can the technician guarantee that the memory is correctly aligned?
4. What is used to prevent the motherboard from touching metal portions of the computer case?
5. Which statement describes the purpose of an I/O connector plate?
6. What are three important considerations when installing a CPU on a motherboard? (Choose three.)
Explanation: The CPU is sensitive to static discharges. Its pins are very delicate and it works at high temperatures, so precautions must be taken. If the CPU has been used in another machine or if the fan is being replaced, you might need to remove the old thermal compound using isopropyl alcohol (not on the CPU contacts). The battery does not need to be removed from the motherboard during the CPU installation. This would cause the saved BIOS settings to be lost. Minimum force should be needed to lock the CPU load lever into place. 7. Which type of drive is typically installed in a 5.25 inch (13.34 cm) bay?
8. Which type of motherboard expansion slot has four types ranging from x1 to x16 with each type having a different length of expansion slot? 9. A technician is installing a new high-end video adapter card into an expansion slot on a motherboard. What may be needed to operate this video adapter card?
10. When assembling a PC, how is pin 1 identified on the front panel cables so that it can be aligned properly with pin 1 on the motherboard panel connector?
12. What is a function of the BIOS?
13. A technician has assembled a new computer and must now configure the BIOS. At which point must a key be pressed to start the BIOS setup program?
14. What data is stored in the CMOS memory chip?
15. What is the purpose of LoJack?
16. Which is a BIOS security feature that can prevent data from being read from a hard drive even if the hard drive is moved to another computer?
Explanation:There are several commonly available BIOS security features. Drive encryption is used to encrypt hard drives to prevent data access. Secure boot ensures that devices will only boot a trusted operating system. BIOS passwords allow different levels of BIOS access. RAID is not a BIOS security feature but rather provides redundancy and fault tolerance by using multiple hard drives. 17. What is one purpose of adjusting the clock speed within the BIOS configuration settings?
18. A technician is assembling a new computer. Which two components are often easier to install before mounting the motherboard in the case? (Choose two.)
19. Which two components are commonly replaced when a computer system with a newer motherboard is being upgraded? (Choose two.)
20. A user reports that every morning when a particular computer is turned on, the configuration settings on that computer have to be reset. What action should be taken to remedy this situation?
22. When should a technician use unsigned drivers for newly installed computer hardware?
23. What computer component is often required to allow a single computer to use two monitors simultaneously?
24. A technician notices that half of the memory slots on a motherboard are colored differently from the other half. Which technology is probably implemented on this system?
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