2.1.8 Prictice questions

Which of the following are safe methods of lifting heavy objects? (Select TWO.)

1. Bend your knees with your back straight. 2. Lift with your legs. (When lifting heavy objects, bend your knees, keep your back straight, and use your legs to liftobjects. The other lifting methods listed may cause serious injury.)

To prevent ESD when replacing internal computer components, you attach an anti-static wrist strap toyour wrist. Where should the other end be fastened? (Select TWO.)

1. Metal area on the computer case 2. Anti-static mat (When using an anti-static wrist strap, you should connect the wrist strap to yourself and the other endto a ground such as the clip on the anti-static mat, or to an area on the computer case so that you andthe computer are at the same electrical potential. Never connect the wrist strap to a power outlet,power supply, or ground on a power source.)

Which of the following will help reduce the threat of static discharge when working on computerhardware? (Select TWO.)

1. Remain in physical contact with the server chassis at all times. 2. Store unused components in static shielding bags (To reduce the threat of static discharge when working on PC hardware, you should: Store unused components in static shielding bags. Remain in physical contact with the server chassis at all times. Reducing the humidity would increase the likelihood of a static discharge. Leaving the systemplugged into a grounded wall outlet may theoretically reduce the likelihood of a static discharge, butit's also extremely dangerous and should never be done. Always unplug your systems before workingon them. Using Styrofoam near computer components increases the build up of static electricity andshould be avoided. You should never touch the leads of a component. If a static discharge occurs, thecurrent is carried directly to the most sensitive parts of the component.)

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. To ensure your personal safety, which of the following should you do FIRST

Disconnect power (Before you begin any internal service on a computer, you must always be sure that the computer iscompletely disconnected from the power source. Not removing power can lead to serious harm ordeath. After the power is disconnected, you should remove any jewelry. Doing this eliminates the possibilityof accidentally getting any electronic discharges. Placing the computer on an ESD mat and using safety glasses would also be beneficial, but the firstthing you should do is disconnect power.)

To improve the safety of your location and to comply with regulations regarding work environmentswith 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?

Download them from the chemical manufacturer's websites (Material Safety Data Sheets (MSDS) are written and made available by chemical manufacturers. Youcan download them from the manufacturer's website or request them from a company representative)

You work for a store that sells and repairs computers. Due to the room's layout, while repairingcomputers, 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?

ESD wrist strap (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 thesecircumstances, it is best to use an electrostatic discharge (ESD) wrist strap to ensure propergrounding. An ESD heel strap only works if the surface the technician is walking on is ESD-protected. Since thisroom has nothing but carpet, heel straps would be ineffective. ESD mats neutralize the static buildup between the computer and mat, but it is still best if youconnect yourself to the computer via an ESD wrist strap. Otherwise, the static electricity you gain bywalking across the floor 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 staticmay build up if you shuffle your feet while working.)

What is your top priority when responding to emergencies and hazardous situations?

Ensure the safety of people in the area.(Your top priority is to protect the safety of individuals. Do this before taking any other actions toprotect data or the environment)

A technician works in a factory where there is a significant amount of EMI (electromagneticinterference) emissions. Due to this EMI, several of the computers that control the factory'smanufacturing machines are unable to communicate with the network. Which of the following network cabling options would be the BEST for reestablishing networkcommunications?

Fiber optic(Fiber optic cabling is totally immune to EMI and provides the highest level of EMI protection. Coaxial cabling is highly resistant to EMI, but is not as good as fiber optic cabling. Due to the number of twists, Cat 7 cabling provides better protection from EMI than Cat 5e cabling.Cat 7 can also be procured with added EMI shielding. However, Cat 7, with or without shielding, isnot as good as fiber optic cabling. Cat 5e provides good protection from EMI. However, Cat 7, coaxial, and fiber optic cabling providebetter protection.)

Your U.S.-based company has recently purchased an old office building where employees are beingassigned to work. As you are setting up the employees' desktop computers, you come to one locationwhere the nearest wall outlet has only two prongs. All of the metal-enclosed desktop computers havethree-prong cords. Which of the following is the BEST way to proceed with that particular desktop computer?

Find a different outlet that uses three prongs. (The third, or middle, prong of a computer plug is the grounding prong. In the event of a malfunction,the electricity flows through the grounding prong to the earth which, in turn, trips off the breaker,removing all electricity from that outlet. If the grounding prong is removed or bypassed and amalfunction occurs, the electricity will find the next shortest path to the earth, which may be a personwho touches the computer. Having the electricity pass through a person could cause serious harm oreven death. You should never remove the third grounding prong or use an adapter to bypass the prong.)

Of the following choices, which action could be most physically harmful to you?

Looking into the end of a fiber optic cable. (Never look into a fiber optic cable or any other possible source of laser light. Laser light can damageyour eyes and even cause blindness. When working on a computer, you should use a grounding strapto protect the component from ESD damage. Using a computer without a surge protector could leadto computer damage, but doesn't have any effect on your personal safety. Ejecting an optical disc witha paper clip is an acceptable way to remove a disc if the drive door won't open.)

Which of the following components requires special disposal procedures to comply with environmental guidelines?

Notebook Battery (Ni-Cad, NiMH, and other notebook battery types can contain regulated materials. Read the battery'sdocumentation for a description of correct disposal procedures. Incorrect disposal can result in seriousfines. While using special recycling services when disposing of computer components isenvironmentally friendly, most locations do not have laws regarding the disposal of most commoncomponents.)

The fan in a 450-Watt power supply is malfunctioning. What action should you take?

Remove and replace the power supply. (Dangerous voltages can remain inside power supplies, even when they are unplugged. Do not attemptany repairs on a power supply except completely replacing the power supply unit.)

You work for a large company that has over 1000 computers. Each of these computes uses a wirelessmouse and keyboard. Therefore, your company goes through a lot of alkaline batteries. When thesebatteries can no longer power the intended device, you must decide what to do with them. Unless otherwise dictated by your local authorities, which of the following would be the EASIESTway to deal with these batteries?

They can be thrown in the trash. (Alkaline batteries manufactured after 1996 are made of relatively non-hazardous materials and can betossed directly into the trash, in most states. There is no need to send them to a hazardous waste collection. Alkaline batteries do not have anexpiration date that needs to be meet before they can be thrown away. Technically speaking, an Alkaline battery can be recharged, although most manufactures tell you notto recharge them. If you recharge an alkaline battery, you risk an explosion, and you will have a low-quality battery if the charge is successful.)

Your company has a plan in place to upgrade each employee's laptop computer to a newer modelevery three years. As a result, you often have old laptop batteries. Unless otherwise dictated by your local authorities, which of the following is the BEST way to dealwith these types of batteries?

They must be recycled. (Laptop batteries contain hazardous materials such as mercury, cadmium, and lead. These toxicsubstances harm the environment. If thrown away, they can enter the food chain, adversely affectingplants, animals, and humans. Therefore, these batteries must be recycled or given to a hazardouswaste facility. Since new computers come with their own new battery, there is no need to recharge and keep the oldbatteries. In addition, these batteries lose their holding capacity and will most likely not be able topower a device for any useable length of time. Laptop batteries do not need to be keep on-site until acertain expiration date has been meet. Once you are done with them, they can be recycled ordeposited at the hazardous waste facility.)

What is the purpose of an MSDS?

To document how to safely handle and dispose of hazardous materials. (A material safety data sheet (MSDS) documents how to safely handle and dispose of hazardousmaterials.)