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CompTIA A+ > Chapter 11 > Flashcards

Chapter 11 Flashcards

1
Q

When discussing safety issues with regard to PCs let’s break them down into four general areas: p 505

A

Computer components
Electrostatic discharge
Electromagnetic interference
Natural elements

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2
Q

There’s one exception to the power-off rule: p505

A

You don’t have to power off the computer when working with hot-swappable parts which are designed to be unplugged and plugged back in when the computer is on

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3
Q

The two biggest dangers with power supplies are what? p505

A

Burning yourself and electrocuting yourself

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4
Q

Power supplies contain several capacitors that can hold what? p505

A

Lethal charges long after they have been unplugged

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5
Q

When talking about power and safety you will almost always hear the saying. p 506

A

It’s not the volts that kill you it’s the amps

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6
Q

If you ever have to work on a power supply for safety’s sake you should discharge all what? p506

A

Capacitors within it

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7
Q

Other than the power supply the most dangerous component to try to repair is a what? p 506

A

(CRT) cathode-ray tube monitor

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8
Q

If you have to open a monitor you must first discharge the high-voltage charge on it by using a what? p507

A

High-voltage probe

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9
Q

Do not use an ________ when discharging the monitor doing so can lead to a fatal electric shock. p507

A

ESD strap

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10
Q

These types of devices require an ______ which provides the high-voltage high-frequency energy needed to power the backlight. p507

A

inverter

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11
Q

Small circuit board installed behind the LCD panel that takes AC power and converts it for the backlight. p507

A

Inverter

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12
Q

Generally made of metal and some have very sharp edges inside that can cut you. p507

A

Cases

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13
Q

(ESD) stands for what? p508

A

Electrostatic discharge

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14
Q

Happens when two objects of dissimilar charge come in contact with one another. The two objects exchanges electrons in order to standardize the electrostatic charge between them. This charge can and often does damage electronic components. p509

A

ESD

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15
Q

CPU chips and memory chips are particularly sensitive to what? p509

A

ESD

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16
Q

A device that is specially designed to bleed electrical charges away safely. p 511

A

ESD strap

17
Q

This mat drains excess charge away from any item coming in contact with it. p 511

A

ESD Antistatic Mats

18
Q

Important tools to have at your disposal when servicing electronic components because they protect the sensitive electronic devices from stray static charges. p511

A

Antistatic bags

19
Q

Unlike antistatic mats, antistatic bags do not ________ the charges away and they should never be used in place of an antistatic mat. p511

A

Drain

20
Q

Is not as effective as using proper anti-ESD gear but it makes up for that with its simplicity. p512

A

Self- grounding

21
Q

(ICs) stands for what? p512

A

Integrated circuits

22
Q

(EMI) stands for what? p513

A

Electromagnetic interference

23
Q

(RFI) stands for what? p513

A

Radio frequency interference

24
Q

An unwanted disturbance caused by electromagnetic radiation generated by another source. p513

A

EMI

25
Q

Work by generating an electromagnetic field. p 513

A

Magnet

26
Q

Can operate at a variety of frequencies. Some of the more common ones are 900MHz 1.9GHz 2.4GHz and 5.8GHz. p 513

A

Cordless phones

27
Q

Convenient devices to heat foods and beverages. The radiation they generate is typically in the 2.45GHz range although it can vary slightly. p 513

A

Microwave ovens

28
Q

PC techs also commonly carry the following tools: p517-518

A 
Pliers
Wire cutters
Strippers
Mirrors
Flash lights
Compressed air
29
Q

They use this for cables so that you don’t trip on them when you are working what is this called? p518

A

Floor cable guard

30
Q

Another useful tool to keep cables under control is a what? p519

A

cable ties

31
Q

(OSHA) stands for what? p520

A

Occupational Safety and Health Administration

32
Q

Requires employers to provide a workplace that is free of recognized danger and hazards. p520

A

OSHA

33
Q

(MSDS) stands for what? p522

A

Material Safety Data Sheets

34
Q

Four major classes of fire extinguishers are available one for each type of flammable substance: p523

A 
A= for wood and paper fires
B= for flammable liquids
C= for electrical fires
D= (metal powder or NaCI [salt]) for flammable metals such as phosphorus and sodium
35
Q

The most popular type of fire extinguisher today is the multipurpose. p 523

A

ABC rated extinguisher

CompTIA A+ (20 decks)

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