Lesson 4 Chapter 2 - ESD Precautions and Procedures

Question 1

Humans usually don’t feel anything less than 3,500 volts of static electricity but as little as __ volts can damage a circuit board

Answer 1

5 volts

Question 2

What are the 3 types of ESD damage?

Answer 2

1. Catastrophic damage
2. Hidden damage
3. Gradual degradation

Question 3

What is catastrophic ESD damage? How would you know it happened?

Answer 3

It immediately fries the component, you would know as you would most likely feel the shock that happened

Question 4

What is hidden ESD damage? How would you know it happened?

Answer 4

Hidden ESD damage is caused by a build-up of dust over time, and this can create a small electrical charge that can make a component behave erratically. (Charge doesn’t cause obvious damage)

It’s difficult to pinpoint the cause by this point.

Question 5

What is ESD degradation? How would you know it happened?

Answer 5

ESD gradual degradation is similar to hidden ESD damage and is caused by cumulative low-level electrical damage over time and gradually gets more noticeable. Components will also behave erratically and it’d be hard to pinpoint the cause.

Question 6

What are 4 anti-static protection devices you can use?

down, cover

Answer 6

1. Antistatic wrist or ankle wrap
2. Antistatic placemat
3. Antistatic floor mat
4. Antistatic bag

Question 7

Antistatic devices make your body’s ____ ____ the same as the ___ ___ of your PC/component

Answer 7

Antistatic devices make your body’s electrical potential the same as the electrical potential of your PC/component

Question 8

What is electrical potential?

over 9000

Answer 8

Electrical potential is your body’s (or a component’s) charge relative to the zero ground of the Earth

Question 9

What should you ALWAYS do before touching a pc component? How can you do this (2)?

Answer 9

Always discharge ESD before touching components
1. Touch the metal case
2. Touch the metal power supply

Question 10

What type of components are more susceptible to ESD? Why? (3)

Answer 10

Motherboards, RAM, and adapters are more susceptible, any exposed circuit boards will be more vulnerable

Question 11

What’s an example of a component with less risk of ESD?

cage

Answer 11

An enclosed device such as a hard drive has less risk than circuit boards for ESD

Question 12

Antistatic wraps and straps use what level of resistor that protects against very low-level static electricity only?

kilo

Answer 12

1-megaohm resistor, protects against very low-level static electricity only

Question 13

What’s a warning when using anti-static wraps and straps?

high

Answer 13

Always take off your antistatic wraps and straps before handling or being near any high-voltage components as it can actually make the potential damage WORSE

Question 14

How do anti-static bags work?

jacket, gill

Answer 14

Anti-static bags have a coating on the inside that dissipates static electricity along with filaments that line the interior of the bag. The static is sent to the outside of the bag.

Question 15

Always store ___ ___ and ____ in antistatic bags when not in use or transporting them

Answer 15

Adapter cards and drives in antistatic bags

Question 16

How do antistatic bags work best?

omelette, stick

Answer 16

Antistatic bags work best when they’re closed, so it’s best to fold over the edge and tape it down with an antistatic sticker if possible

Question 17

What’s an important warning when working with antistatic bags?

Answer 17

NEVER place components on top of the bag, this will actually damage the components and is worse than not having a bag at all

Question 18

What type of bags should you never use to store components?

Answer 18

Plastic bags cause static electricity, and paper bags don’t protect