2.1.6 Practice Questions
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School
ECPI University *
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Course
101
Subject
Industrial Engineering
Date
Jan 9, 2024
Type
docx
Pages
8
Uploaded by DeanStrawTurtle141
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?
Answer
Put on safety glasses.
Remove jewelry.
Correct Answer:
Disconnect power.
Place the computer on an ESD mat.
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
beneficial, but the first 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
Question 2:
Correct
Your U.S.-based company has recently purchased an old office 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?
Answer
Use the existing cord, but remove the grounding prong, as it is not required.
Correct Answer:
Find a different outlet that uses three prongs.
Get a new power cord with two prongs to match the wall outlet.
Purchase an adapter that converts the three-prong cable to two prongs.
Explanation
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 a malfunction occurs, the electricity will find 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
Question 3:
Correct
In which of the following situations should you NOT use an ESD wrist strap?
Answer
When replacing worn or frayed power cords.
When wearing jewelry.
Correct Answer:
When working with high-voltage components.
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 specifically 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
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?
Answer
Write them yourself after researching the issues.
Get them from your local workers' safety insurance office.
Ask your manager for them.
Correct Answer:
Download them from the chemical manufacturer's websites.
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 office 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
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2.1.1 Safety
2.1.2 Safety Measures
2.2.1 Environmental Concerns
2.2.2 Environmental Facts
q_com_safm_find_msds_pp7.question.fex
Question 5:
Correct
Which of the following devices can store large amounts of electricity, even when
unplugged?
Answer
DVD optical drive
LCD monitor
Hard disk drive
Correct Answer:
CRT monitor
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 sufficient 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
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.)
Answer
Correct Answer:
Use a special vacuum to clean dust from all hardware components.
Use a continuous stream of compressed air to clean all components.
Correct Answer:
Use short bursts of compressed air to clean delicate components.
Remove the power supply to do detailed cleaning.
Use a lint-free cloth and cleaning solvent to remove all dust accumulation.
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 office, 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
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?
Answer
Correct Answer:
10 volts
500 volts
100 volts
50 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
Question 8:
Correct
Which of the following is a myth regarding electrostatic discharge (ESD)?
Answer
Correct Answer:
If you can't feel ESD, the surge is not sufficient to harm computer components.
Most often, ESD degrades computer components, and they fail at a later date.
Simply touching an object can create static electricity. You do not have to rub the
object.
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
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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?
Answer
ESD mat
Correct Answer:
ESD wrist strap
ESD heel strap
Self-grounding
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 ineffective.
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 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 static may build up if you shuffle 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
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.)
Answer
Ground wire on the power supply
Correct Answer:
Anti-static mat
Ground wire on the wall power outlet
Correct Answer:
Metal area on the computer case
Screw on the wall power outlet
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