LAB PROCEDURE AND TOOLS-SAFTEY

Question 1

General safety measures

Answer 1

1. Remove jewelry and loose clothing
2. No food and drink
3. Beware of hot / sharp parts and areas using high voltage
4. Dont open power supply or CRT monitor

Question 2

Electrical Safety Measures

Answer 2

1. Do not exchange AC adapters between PCs

2. Do not wear AWS when repairing power supplies or CRT monitors

Question 3

Fire Safety Measures

Answer 3

1. Have and know how to use an extinguisher
2. Be alert of burning odors - overheating
3. Never fight an out of control fire
4. Get out quickly

Question 4

Precautions against Electrostatic Discharge(ESD)

Answer 4

1. Store all components in antistatic bags
2. Grounded mats on floors and work benches
3. Use antistatic Wrist Straps

Question 5

Types of AC power fluctuations that cause loss of data or Hardware failure(5)

Answer 5

1.BLACKOUT
Complete loss-blown fuse, damaged transformer etc
2.BROWNOUT
Reduced voltage over a long period of time
3.NOISE
Interference from generators and lighting- poor quality power leading to errors
4.SPIKE
Sudden increase in voltage that lasts a short time and exceeds 100 percent of normal voltage. Lightning or when a system comes on after a spike
5.POWER SURGE
Dramatic increase in voltage above the normal flow of electrical current

Question 6

Examples of power protection devices

Answer 6

1. Surge repressor- Diverts excess to the ground
2. UPS-Supplies consistent level of quantity of power
3. Standby Power Supply-Provides backup when voltage drops below normal. Is on stand-by

Question 7

What is preventive maintenance and how does it increase the lifespan of a computer?

Answer 7

Regular and routine maintenance of equipment and assets in order to keep them running and prevent costly unplanned downtime from equipment failure

• Prevents age related failure
• Practices like tidying up prevents accidents
• Protects from breakdown caused by malicious software
• Practices like deleting unused files reduces strain on some components

Question 8

Examples of preventive maintenance on software

Answer 8

• Running malware checks
• Updating documentation and software environment
• Optimizing code

Question 9

Examples of preventive maintenance on hardware

Answer 9

cleaning
lubrication
parts replacement

Question 10

When shouldn’t you wear the AWS?

Answer 10

Do not wear AWS when repairing power supplies or CRT monitors

Question 11

How many volts does it take to damage a computer system?

Answer 11

less than 30

For ESD to be felt-at least 3000V