Ch 7 ESD Precautions Test Quiz
Electricity can be very dangerous if one does not ensure they are well protected. The quiz below is designed to test how knowledgeable you are when it comes to precautions on electrostatic discharge as discussed in chapter 7 of the ESD course. Give it a try and remember to be safe!
Questions and Answers
- 1.
What does ESD stand for?
- A.
Electronic surveillance device
- B.
Electric shock damage
- C.
Electrostatic discharge
- D.
Electronic software distribution
Correct Answer
C. Electrostatic dischargeExplanation
ESD stands for electrostatic discharge. Electrostatic discharge refers to the sudden flow of electricity between two electrically charged objects caused by contact, electrical short, or dielectric breakdown. It can cause damage to electronic devices and circuits if not properly controlled. This term is commonly used in the context of handling and protecting electronic components to prevent damage from static electricity.Rate this question:
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- 2.
ESD can damage a computer by:
- A.
Decalibrating the CRT
- B.
Damaging sensitive chips
- C.
Starting a fire in the enclosure
- D.
Damaging the laser in the optical drive
Correct Answer
B. Damaging sensitive chipsExplanation
ESD, or electrostatic discharge, can cause damage to sensitive chips in a computer. When a static charge is discharged through a computer component, it can cause a sudden surge of electricity that exceeds the chip's tolerance, leading to permanent damage. This can result in malfunctions or complete failure of the affected chip, impacting the overall performance and functionality of the computer. Therefore, it is crucial to handle computer components with proper ESD precautions to prevent damage to these sensitive chips.Rate this question:
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- 3.
Which THREE of the following should you keep away from an ESD-safe workbench?
- A.
A. plastics
- B.
B. polyester clothing
- C.
C. foam rubber
- D.
D. Styrofoam
- E.
E. ion generator
- F.
F. alligator clips
Correct Answer(s)
A. A. plastics
B. B. polyester clothing
D. D. StyrofoamExplanation
Plastics, polyester clothing, and Styrofoam should be kept away from an ESD-safe workbench because they are all materials that can generate static electricity. Static electricity can damage sensitive electronic components, so it is important to avoid these materials in an ESD-safe environment. Foam rubber, ion generators, and alligator clips do not generate static electricity and can be safely used on an ESD-safe workbench.Rate this question:
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- 4.
Do NOT wear a grounded wrist strap when you:
- A.
Discharge a CRT
- B.
Handle a logic board
- C.
Open a computer case
- D.
Work at a customer site
Correct Answer
A. Discharge a CRTExplanation
Discharging a CRT (Cathode Ray Tube) involves releasing the stored electrical charge in the monitor to prevent electric shock. When discharging a CRT, it is important not to wear a grounded wrist strap because it can create a path for the electrical charge to flow through the body, potentially causing harm. Therefore, it is recommended to remove any conductive materials, including wrist straps, before discharging a CRT to ensure personal safety.Rate this question:
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- 5.
To reduce the risk of ESD damage, handle all circuit boards by the _________________.
- A.
Pins
- B.
Body
- C.
Edges
- D.
Connectors
- E.
Exposed circuitry
Correct Answer
C. EdgesExplanation
To reduce the risk of ESD damage, it is recommended to handle all circuit boards by the edges. This is because the edges of the circuit board are less likely to have exposed circuitry or sensitive components. By holding the board by the edges, the risk of accidentally touching and damaging any delicate parts or causing electrostatic discharge is minimized.Rate this question:
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- 6.
To reduce the risk of ESD damage,
- A.
Ground yourself
- B.
Make sure the equipment is on
- C.
Keep the equipment on a metal surface
- D.
Touch the equipment to plastic
Correct Answer
A. Ground yourselfExplanation
To reduce the risk of ESD (electrostatic discharge) damage, it is important to ground yourself. This means that you need to discharge any built-up static electricity in your body before coming into contact with sensitive electronic equipment. By grounding yourself, you are ensuring that any potential static charges are safely dissipated, preventing them from damaging the equipment. This can be done by touching a grounded metal object, such as a metal surface or a grounding strap, before handling the equipment.Rate this question:
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- 7.
To reduce the risk of ESD damage, do not touch anyone who is working on:
- A.
A CRT
- B.
An expansion bay
- C.
A photo conductor assembly
- D.
A circuit board
Correct Answer
D. A circuit boardExplanation
When working on a circuit board, it is important not to touch anyone who is also working on it in order to reduce the risk of ESD (Electrostatic Discharge) damage. ESD can occur when there is a sudden flow of electricity between two objects with different charges, and this discharge can damage electronic components on the circuit board. By avoiding physical contact with someone working on a circuit board, the risk of ESD damage is minimized.Rate this question:
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- 8.
To reduce the risk of ESD damage, use static-shielding _____.
- A.
Mats
- B.
Bags
- C.
Clips
- D.
Straps
Correct Answer
B. BagsExplanation
To reduce the risk of ESD (Electrostatic Discharge) damage, it is recommended to use static-shielding bags. These bags are specially designed to protect electronic components and devices from static electricity. The bags have a conductive layer that prevents the buildup of static charge and safely dissipates any existing charge. By storing sensitive electronic items in static-shielding bags, the risk of ESD damage is minimized, ensuring the longevity and proper functioning of the devices.Rate this question:
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- 9.
There are four basic pieces of equipment needed to reduce the risk of damage from ESD. Which one of the following is NOT one of the four?
- A.
Grounded mat
- B.
Wrist strap
- C.
Plastic storage bags
- D.
Ground cord with alligator clips
- E.
Ground polarity tester
Correct Answer
C. Plastic storage bagsExplanation
Plastic storage bags are not one of the four basic pieces of equipment needed to reduce the risk of damage from ESD. Grounded mat, wrist strap, ground cord with alligator clips, and ground polarity tester are all essential in reducing the risk of damage from ESD. However, plastic storage bags do not provide any grounding or protection against ESD and are therefore not considered as one of the necessary equipment.Rate this question:
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- 10.
ESD-preventive equipment reduces the risk of damage from ESD by:
- A.
Eliminating electrostatic charge
- B.
Storing electrostatic charge
- C.
Dispersing electrostatic charge
- D.
Increasing electrostatic charge
Correct Answer
A. Eliminating electrostatic chargeExplanation
ESD-preventive equipment reduces the risk of damage from ESD by eliminating electrostatic charge. This means that the equipment is designed to remove or neutralize any built-up electrostatic charge, preventing it from causing damage to sensitive electronic components. By eliminating the charge, the equipment ensures that there is no potential for a sudden discharge that could harm the devices. This is crucial in industries where electrostatic discharge can cause significant damage or malfunction to electronic equipment.Rate this question:
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- 11.
Explain how electrostatic discharge (ESD) causes damage.
- 12.
Describe: ESD Risks
- 13.
ESD Solutions: The basic premise of these guidelines is to electrically connect the equipment being serviced, your body, and the workbench together to a good Earth ground, in a particular way, so that it is virtually impossible for any one of these materials to build up a static electrical charge relative to the others. Check all that apply:
- A.
Handle all components by edges
- B.
Ground yourself...except when the unit is plugged in
- C.
Don't place components on metal surfaces
- D.
Don't touch anyone while grounded
- E.
Use static-shielding bags for storing components
- F.
Keep polyester, vinyl, styrofoam away from components
- G.
70-90% Humidity is good
- H.
Use ion generator if possible
- I.
Clean ESD mats regularly
Correct Answer(s)
A. Handle all components by edges
B. Ground yourself...except when the unit is plugged in
C. Don't place components on metal surfaces
D. Don't touch anyone while grounded
E. Use static-shielding bags for storing components
F. Keep polyester, vinyl, styrofoam away from components
G. 70-90% Humidity is good
H. Use ion generator if possible
I. Clean ESD mats regularlyExplanation
These guidelines suggest several measures to prevent the buildup of static electricity and protect electronic components from damage. Handling components by their edges helps minimize contact with sensitive parts and reduces the risk of static discharge. Grounding yourself is important to equalize any static charge between your body and the equipment, except when the unit is plugged in as it may pose a risk. Avoid placing components on metal surfaces to prevent potential static buildup. It is important not to touch anyone while grounded to avoid transferring any static charge. Using static-shielding bags for storing components helps protect them from external static charges. Keeping materials like polyester, vinyl, and styrofoam away from components is important as they can generate static electricity. Maintaining humidity levels between 70-90% helps dissipate static charges. If possible, using an ion generator can help neutralize static charges in the environment. Lastly, regular cleaning of ESD mats helps maintain their effectiveness in dissipating static charges.Rate this question:
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- 14.
Myth or Fact: I don't use ESD precautions and have never had a problem.
- How would you know? You may be damaging parts in ways that do not show up immediately via system performance or diagnostic routines. Apple has tested for ESD damage and consistently found that mishandling components and systems creates IC damage.
- A.
Myth
- B.
Fact
Correct Answer
A. MythExplanation
The given answer suggests that the statement "I don't use ESD precautions and have never had a problem" is a myth. The explanation states that even if someone has not experienced immediate problems or performance issues, they may still be damaging parts in ways that are not immediately noticeable. Apple's testing has consistently shown that mishandling components and systems can lead to IC (integrated circuit) damage. Therefore, it is important to use ESD precautions to prevent potential damage.Rate this question:
- 15.
Myth or Fact: I don't have time to be tied down with wrist straps and mats.
- Mishandling components creates DOA parts that slow down repairs and drive customer dissatisfaction. In addition, you can set up work areas using heel straps instead of wrist straps. This leaves your hands free.
- A.
Myth
- B.
Fact
Correct Answer
A. MythExplanation
The given explanation suggests that the statement "I don't have time to be tied down with wrist straps and mats" is a myth. It states that mishandling components can lead to the creation of DOA (Dead on Arrival) parts, which in turn can slow down repairs and lead to customer dissatisfaction. It also mentions that work areas can be set up using heel straps instead of wrist straps, allowing for hands-free work. Therefore, the explanation implies that it is important to use wrist straps and mats to prevent mishandling and ensure efficient repairs.Rate this question:
- 16.
Myth or Fact: If Apple was really serious about ESD precautions, it would not tell customers to just touch metal before replacing DIY parts.
- Customers replace far fewer parts than service technicians. Since it is difficult to train customers in the best ESD techniques, Apple asks them to practice a less effective procedure that they can readily do.
- A.
Myth
- B.
Fact
Correct Answer
A. MythExplanation
The given answer is "Myth". The explanation for this is that Apple does take ESD precautions seriously and they do provide guidelines for customers to follow when replacing DIY parts. However, it is true that customers replace far fewer parts than service technicians and it may be more difficult to train customers in the best ESD techniques. Therefore, Apple asks customers to practice a less effective procedure of touching metal before replacing DIY parts, which is still better than not taking any precautions at all.Rate this question:
- 17.
Myth or Fact: Only RAM and logic boards require ESD precautions. Everything else is shielded
- Not true. Most components have some circuitry. In addition, replacing a component such as a cable may require handling many other components that contain ICs. It is far wiser to take ESD precautions whenever you have to open up a system.
- A.
Myth
- B.
Fact
Correct Answer
A. MythExplanation
Most components have some circuitry and can be sensitive to electrostatic discharge (ESD). This includes cables and other components that contain integrated circuits (ICs). Therefore, it is not true that only RAM and logic boards require ESD precautions. It is important to take ESD precautions whenever opening up a system to prevent damage to sensitive components.Rate this question:
- 18.
Myth or Fact: You do not have to be hardwired to ground to practice correct ESD precautions.
- There are some products which claim to ground you without the use of direct connections to ground. Such "wireless" solutions have not been proven. Use a grounded wrist strap or heel strap. Those work.
- A.
Myth
- B.
Fact
Correct Answer
A. MythExplanation
The correct answer is "Myth". This means that the statement "You do not have to be hardwired to ground to practice correct ESD precautions" is not true. The explanation provided states that there are products claiming to ground you without direct connections to ground, but these "wireless" solutions have not been proven. Therefore, the correct way to practice correct ESD precautions is by using a grounded wrist strap or heel strap.Rate this question:
- 19.
Make sure you are NOT grounded when: - you work on plugged-in equipment - you discharge a cathode-ray tube (CRT) - you work on an unplugged CRT that has not been discharged - you are performing live adjustments
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
When working on plugged-in equipment, discharging a cathode-ray tube (CRT), working on an unplugged CRT that has not been discharged, or performing live adjustments, it is important not to be grounded. Being grounded in these situations can result in electric shock or damage to the equipment.Rate this question:
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- 20.
Before working on any circuit board or assembly containing ESD-sensitive circuits, ground yourself and the equipment you are working on to an earth or building ground. Use a grounded conductive workbench mat and a grounding wrist strap, and ground the equipment to the mat. ESD Mat and snap fastener with lead to ground:
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
It is important to ground yourself and the equipment when working on ESD-sensitive circuits to prevent any static electricity from damaging the components. Using a grounded conductive workbench mat and a grounding wrist strap helps to dissipate any static charges that may build up on your body. The ESD mat and snap fastener with lead to ground provide a direct path for the static electricity to flow away from the equipment, further protecting the sensitive circuits. Therefore, the statement is true.Rate this question:
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- 21.
Never place components on any ____ ____. _____ _____ can hold a static charge that will damage sensitive electronic parts. Use antistatic, conductive, or foam rubber mats.
Correct Answer
metal surface
Metal surfacesExplanation
Metal surfaces can hold a static charge that can damage sensitive electronic parts. Therefore, it is important to never place components on any metal surface. Instead, it is recommended to use antistatic, conductive, or foam rubber mats to prevent any potential damage.Rate this question:
- 22.
Do not touch anyone who is working on ESD _____ _____ or _____ _____ of any kind. If you touch someone who is properly grounded, your "zap" or body charge may not cause any damage, but just to be safe, keep your own body charge away from other technicians.
Correct Answer
sensitive circuits
circuit boardsExplanation
It is important not to touch anyone who is working on ESD sensitive circuits or circuit boards of any kind. This is because when you touch someone who is properly grounded, your "zap" or body charge may not cause any damage to the sensitive circuits or circuit boards, but it is still recommended to keep your own body charge away from other technicians to ensure their safety and prevent any potential damage to the electronic components.Rate this question:
- 23.
Use _____ - _____ storage bags for boards and assemblies with circuit boards on them. Before you leave your bench to take a board to a storage place, put the board in a _____-_____ bag. Leave all Apple replacement modules in their ESD-safe packaging until you need them.
Correct Answer
static shielding
static shieldingExplanation
The correct answer is "static shielding, static shielding." This means that the recommended type of storage bags for boards and assemblies with circuit boards on them is static shielding bags. These bags are designed to protect electronic components from electrostatic discharge (ESD) damage. It is important to put the board in a static shielding bag before moving it to a storage place to ensure its safety. Additionally, Apple replacement modules should be kept in their ESD-safe packaging until they are needed to prevent any potential damage from static electricity.Rate this question:
- 24.
Do not wear polyester clothing or bring plastic, vinyl, or Styrofoam into the work environment. The electrostatic field that surrounds these nonconductors cannot be totally removed.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The statement explains that wearing polyester clothing or bringing plastic, vinyl, or Styrofoam into the work environment should be avoided because these nonconductors create an electrostatic field that cannot be completely eliminated. Therefore, the statement is true.Rate this question:
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- 25.
Do not wear _____ clothing or bring _____, _____, or _____ into the work environment. The electrostatic field that surrounds these nonconductors cannot be totally removed.
- A.
Polyester
- B.
Plastic
- C.
Vinyl
- D.
Styrofoam
Correct Answer(s)
A. Polyester
B. Plastic
C. Vinyl
D. StyrofoamExplanation
The correct answer includes four types of materials: polyester, plastic, vinyl, and styrofoam. These materials are all nonconductors, meaning they do not easily allow the flow of electricity. The statement advises against wearing or bringing these materials into the work environment because they create an electrostatic field that cannot be completely eliminated. This electrostatic field can potentially interfere with electronic equipment or cause damage.Rate this question:
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- 26.
If possible, keep the humidity in the service area between 70% and 90%, and use an ion generator. Charge levels are reduced (but not eliminated) in high-humidity environments.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The explanation for the given answer "True" is that keeping the humidity in the service area between 70% and 90% and using an ion generator can help reduce charge levels in the environment. While high humidity does not completely eliminate charge levels, it does help in reducing them. Therefore, it is recommended to keep the humidity within the specified range and use an ion generator to maintain a suitable environment.Rate this question:
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- 27.
If you have ESD mats in your service area, it is important to clean them at least once a week. To clean them you need to use a cleaner that is specifically designed for ESD mats. Otherwise the mats will not ground equipment placed on them.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
ESD mats are designed to dissipate static electricity and prevent damage to sensitive electronic equipment. Over time, these mats can accumulate dirt, dust, and other contaminants that can interfere with their ability to ground equipment properly. Therefore, it is important to clean them regularly to maintain their effectiveness. Using a cleaner specifically designed for ESD mats ensures that the cleaning process does not damage the mats or compromise their ability to ground equipment. By cleaning the mats at least once a week with the appropriate cleaner, you can ensure that they continue to provide the necessary protection against static electricity. Therefore, the statement "If you have ESD mats in your service area, it is important to clean them at least once a week" is true.Rate this question:
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- 28.
An ESD-compliant workstation is one that has equipment and materials designed to prevent ESD damage. List 4 pieces of equipment needed:
- A.
Workbench mat with ground cord
- B.
Wrist strap with a ground cord
- C.
Equipment ground cord with alligator clips
- D.
Ground polarity tester
- E.
All of the Above
Correct Answer
E. All of the AboveExplanation
An ESD-compliant workstation requires several pieces of equipment to prevent ESD damage. A workbench mat with a ground cord is necessary to provide a static-safe surface for working on sensitive components. A wrist strap with a ground cord is essential for grounding the person working at the workstation, preventing the buildup of static electricity. An equipment ground cord with alligator clips is needed to ground any equipment or devices being used. Lastly, a ground polarity tester is necessary to ensure that the workstation's grounding system is functioning properly. Therefore, all of the above equipment is needed for an ESD-compliant workstation.Rate this question:
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- 29.
IMPORTANT: When you work at a customer site, you must take the same precautions to avoid ESD damage. Take time to make the work area ESD-safe. Use a workbench mat and a wrist strap. (For travel convenience, you may want to use mats that fold up.) Be sure everything is properly grounded. Never set parts on the floor.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
When working at a customer site, it is important to take precautions to avoid ESD (Electrostatic Discharge) damage. This includes making the work area ESD-safe by using a workbench mat and a wrist strap. Using mats that fold up can be convenient for travel. It is also important to ensure that everything is properly grounded and to never set parts on the floor. This is necessary to prevent any potential ESD damage that could occur during the work process.Rate this question:
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