Electronics Safety: Essential Practice Questions for Students

10/16/23, 10 : 01 AM Page 1 of 13 https://labsimapp.testout.com/v6_0_573/index.html/productviewer/1193/2.1.6/c32b0bd1-817d-4c69-861f-f2b3554994c3 2.1.6 Practice Questions Candidate: Joseph Vincent (jvince13) Date: 10/16/2023 9:07:03 am • Time Spent: 01:06 Score: 100% Passing Score: 80%

10/16/23, 10 : 01 AM Page 2 of 13 https://labsimapp.testout.com/v6_0_573/index.html/productviewer/1193/2.1.6/c32b0bd1-817d-4c69-861f-f2b3554994c3  Question 1:  Correct Timothy works in the graphic arts departments and has received approval to upgrade his video card. The card has arrived, and you are ready to begin the upgrade by replacing the old video card with the new one in his workstation. To ensure your personal safety, which of the following should you do FIRST? Remove jewelry. Put on safety glasses. Place the computer on an ESD mat. Disconnect power. Explanation Before you begin any internal service on a computer, you must always be sure that the computer is completely disconnected from the power source. Not removing power can lead to serious harm or death. After the power is disconnected, you should remove any jewelry. Doing this eliminates the possibility of accidentally getting any electronic discharges. Placing the computer on an ESD mat and using safety glasses would also be bene fi cial, but the fi rst thing you should do is disconnect power. References  2.1.1 Safety  2.1.2 Safety Measures  2.1.5 ESD Facts q_com_safm_disconnect_power_pp7.question.fex

10/16/23, 10 : 01 AM Page 3 of 13 https://labsimapp.testout.com/v6_0_573/index.html/productviewer/1193/2.1.6/c32b0bd1-817d-4c69-861f-f2b3554994c3  Question 2:  Correct Your U.S.-based company has recently purchased an old o ﬃ ce building where employees are being assigned to work. As you are setting up the employees' desktop computers, you come to one location where the nearest wall outlet has only two prongs. All of the metal- enclosed desktop computers have three-prong cords. Which of the following is the BEST way to proceed with that particular desktop computer? Purchase an adapter that converts the three- prong cable to two prongs. Get a new power cord with two prongs to match the wall outlet. Find a di ff erent outlet that uses three prongs. Use the existing cord, but remove the grounding prong, as it is not required. Explanation The third, or middle, prong of a computer plug is the grounding prong. In the event of a malfunction, the electricity ﬂ ows through the grounding prong to the earth which, in turn, trips o ff the breaker, removing all electricity from that outlet. If the grounding prong is removed or bypassed and a malfunction occurs, the electricity will fi nd the next shortest path to the earth, which may be a person who touches the computer. Having the electricity pass through a person could cause serious harm or even death. You should never remove the third grounding prong or use an adapter to bypass the prong. References  2.1.1 Safety  2.1.2 Safety Measures  2.1.5 ESD Facts q_com_safm_equipment_grounding_pp7.question.fex

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10/16/23, 10 : 01 AM Page 4 of 13 https://labsimapp.testout.com/v6_0_573/index.html/productviewer/1193/2.1.6/c32b0bd1-817d-4c69-861f-f2b3554994c3  Question 3:  Correct In which of the following situations should you NOT use an ESD wrist strap? When wearing jewelry. When working with high-voltage components. When replacing worn or frayed power cords. When replacing memory modules. Explanation Do not use an ESD wrist strap when working with monitors, power supplies, laptop LCD panels, or other high-voltage components. If you wear jewelry when working with hardware components, you need to be careful as it can conduct electricity and cause physical harm. However, using an ESD wrist strap is designed to protect hardware components and does not impact personal safety. An ESD wrist strap protects hardware components and has no impact on personal safety when replacing worn or frayed power cords. An ESD wrist strap is speci fi cally designed to protect memory modules from electrostatic discharge when replacing memory modules in a computer. References  2.1.1 Safety  2.1.2 Safety Measures  2.1.4 ESD Protection  2.1.5 ESD Facts  2.6.2 PC and Networking Tools Facts 

10/16/23, 10 : 01 AM Page 5 of 13 https://labsimapp.testout.com/v6_0_573/index.html/productviewer/1193/2.1.6/c32b0bd1-817d-4c69-861f-f2b3554994c3  3.6.6 Memory Installation Facts q_com_safm_esd_not_use_pp7.question.fex  Question 4:  Correct To improve the safety of your location and comply with regulations regarding work environments with hazardous materials, you have been assigned to assemble Material Safety Data Sheets (MSDS) for all chemicals used in your shop. How should you obtain these documents? Write them yourself after researching the issues. Download them from the chemical manufacturer's websites. Get them from your local workers' safety insurance o ﬃ ce. Ask your manager for them. Explanation Material Safety Data Sheets (MSDS) are written and distributed by chemical manufacturers. You can download them from the manufacturer's website or request them from a company representative. MSDS sheets contain information that is only available from the manufacturer. Neither your manager or a workers' safety insurance o ﬃ ce can provide MSDS documents. Attempting to write your own MSDS sheet can be dangerous, as you do not have all the critical information necessary that is available from the manufacturer. References  2.1.1 Safety 

10/16/23, 10 : 01 AM Page 6 of 13 https://labsimapp.testout.com/v6_0_573/index.html/productviewer/1193/2.1.6/c32b0bd1-817d-4c69-861f-f2b3554994c3  2.1.2 Safety Measures  2.2.1 Environmental Concerns  2.2.2 Environmental Facts q_com_safm_ fi nd_msds_pp7.question.fex

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10/16/23, 10 : 01 AM Page 7 of 13 https://labsimapp.testout.com/v6_0_573/index.html/productviewer/1193/2.1.6/c32b0bd1-817d-4c69-861f-f2b3554994c3  Question 5:  Correct Which of the following devices can store large amounts of electricity, even when unplugged? DVD optical drive CRT monitor LCD monitor Hard disk drive Explanation A cathode ray tube (CRT) monitor can store large amounts of electricity, even when unplugged. You should never open a CRT monitor, as the capacitors within the CRT can store enough electricity to be lethal. LCD monitors do not use large capacitors and are much safer to work on than CRT monitors (although the CCFL backlight has mercury vapor in it, which could be harmful if the tube is broken). DVD optical drives and hard disk drives do not store electricity in su ﬃ cient quantity to be harmful. References  2.1.1 Safety  2.1.2 Safety Measures  2.1.5 ESD Facts q_com_safm_monitor_safety_pp7.question.fex  Question 6:  Correct

10/16/23, 10 : 01 AM Page 8 of 13 https://labsimapp.testout.com/v6_0_573/index.html/productviewer/1193/2.1.6/c32b0bd1-817d-4c69-861f-f2b3554994c3 Jeannette's workstation is overheating. She decides to open the workstation and clean any accumulated dust to see if it helps with the overheating issue. Which of the following can Jeannette safely do to remove dust? (Select two.) Use short bursts of compressed air to clean delicate components. Use a lint-free cloth and cleaning solvent to remove all dust accumulation. Use a continuous stream of compressed air to clean all components. Remove the power supply to do detailed cleaning. Use a special vacuum to clean dust from all hardware components. Explanation Using short bursts of compressed air to clean delicate components followed by using a special vacuum designed to remove dust from all components provides a safe procedure for removing accumulated dust. Removing the power supply to clean it outside of the case can cause personal safety issues as the capacitor in the power supply can still hold an electrical charge. Using a continuous stream of compressed air to clean all components can cause dust to blow into other components and even into the o ﬃ ce, which can then accumulate in other electrical devices. Using a cleaning solvent can cause serious damage to hardware components, especially if it comes in contact with electrical connections. References  2.1.2 Safety Measures  2.2.1 Environmental Concerns  2.2.2 Environmental Facts 

10/16/23, 10 : 01 AM Page 9 of 13 https://labsimapp.testout.com/v6_0_573/index.html/productviewer/1193/2.1.6/c32b0bd1-817d-4c69-861f-f2b3554994c3  2.5.1 PC Maintenance Best Practices  2.5.2 PC Maintenance Facts  13.1.2 Printer Overview Facts q_com_safm_power_supply_safety_pp7.question.fex  Question 7:  Correct While it takes 3,000 volts or more of ESD before you can feel it, it takes very little ESD to damage a computer component. What is the minimum ESD volt discharge that can actually damage a component? 50 volts 10 volts 100 volts 500 volts Explanation A discharge of as little as 10 volts can damage a component, but 3,000 volts or more of ESD must occur before you can even feel it. References  2.1.1 Safety  2.1.2 Safety Measures  2.1.5 ESD Facts q_com_esdp_compare_cabling_pp7.question.fex

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10/16/23, 10 : 01 AM Page 10 of 13 https://labsimapp.testout.com/v6_0_573/index.html/productviewer/1193/2.1.6/c32b0bd1-817d-4c69-861f-f2b3554994c3  Question 8:  Correct Which of the following is a myth regarding electrostatic discharge (ESD)? If you can't feel ESD, the surge is not su ﬃ cient to harm computer components. Simply touching an object can create static electricity. You do not have to rub the object. Most often, ESD degrades computer components, and they fail at a later date. Sitting down or standing up from a chair can create static electricity. Explanation To be felt, an ESD charge has to reach the level of approximately 3,000 volts. Some computer components can be destroyed by discharges as low as 20 or 30 volts. The other statements about ESD are true. References  2.1.2 Safety Measures  2.1.5 ESD Facts  2.6.2 PC and Networking Tools Facts q_com_esdp_esd_myth_pp7.question.fex  Question 9:  Correct

10/16/23, 10 : 01 AM Page 11 of 13 https://labsimapp.testout.com/v6_0_573/index.html/productviewer/1193/2.1.6/c32b0bd1-817d-4c69-861f-f2b3554994c3 You work for a store that sells and repairs computers. Due to the room's layout, while repairing computers, you must walk from one side of the carpeted room to the other frequently. Which of the following would BEST protect you from static electricity buildup? Self-grounding ESD mat ESD heel strap ESD wrist strap Explanation Walking across a room, especially on carpet, will generate static electricity on your person. Discharging this electricity to a computer component may damage that component. Under these circumstances, it is best to use an electrostatic discharge (ESD) wrist strap to ensure proper grounding. An ESD heel strap only works if the surface the technician is walking on is ESD-protected. Since this room has nothing but carpet, heel straps would be ine ff ective. ESD mats neutralize the static buildup between the computer and mat, but it is still best if you connect yourself to the computer via an ESD wrist strap. Otherwise, the static electricity you gain by walking across the ﬂ oor can still be discharged to a computer component you touch. Although self-grounding is good, the fact that you are working on carpet means that additional static may build up if you shu ffl e your feet while working. References  2.1.1 Safety  2.1.2 Safety Measures  2.1.4 ESD Protection  2.1.5 ESD Facts  2.6.2 PC and Networking Tools Facts 

10/16/23, 10 : 01 AM Page 12 of 13 https://labsimapp.testout.com/v6_0_573/index.html/productviewer/1193/2.1.6/c32b0bd1-817d-4c69-861f-f2b3554994c3  3.6.6 Memory Installation Facts q_com_esdp_esd_strap_pp7.question.fex  Question 10:  Correct To prevent ESD when replacing internal computer components, you attach an anti-static wrist strap to your wrist. Where should the other end be fastened? (Select two.) Ground wire on the power supply Metal area on the computer case Screw on the wall power outlet Ground wire on the wall power outlet Anti-static mat Explanation When using an anti-static wrist strap, you should connect the wrist strap to yourself and the other end to a ground such as the clip on the anti-static mat, or to an area on the computer case so that you and the computer are at the same electrical potential. Never connect the wrist strap to a power outlet, power supply, or ground on a power source. References  2.1.2 Safety Measures  2.1.5 ESD Facts  2.6.2 PC and Networking Tools Facts q_com_esdp_wrist_strap_pp7.question.fex

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2.1.6 Practice Questions

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