Computer studies analysis of questions and answers

State two practices to be observed in order to ensure the safety of the computer user

12/11/2021

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State two practices to be observed in order to ensure the safety of the computer user. (2mks)

Computer room should be well lit to avoid eye strain
Avoid over bright wall paints that reflect too mush light causing eye strain
Adjust brightness of the computer monitor until the eyes feel comfortable before using the computer
Use/fit the monitor with radiation filter screens
Avoid using flickering monitor
Seat for the user must be comfortable and have a straight backrest that allows someone to sit upright
Take frequent breaks while working with a computer

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State two ways through which a computer user can minimise Repetitive Strain Injuries (RSI) associated with the use of a computer.

15/1/2021

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State two ways through which a computer user can minimise Repetitive Strain Injuries (RSI) associated with the use of a computer.

Taking regular break intervals when using a computer.
Use an ergonomic keyboard to avoid stress.
Support wrist with wrist rest pad when using a mouse.
Use of standard furniture/proper sitting posture.

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A computer technician has observed a lot of dust on computers in the computer laboratory.

14/1/2021

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A computer technician has observed a lot of dust on computers in the computer laboratory.

State three precautions that need to be put in place to avoid this.

Fit ventilating I air conditioning system to allow free circulation of air.
Fit curtains on the windows / add a curtain net to reduce dust entry into the laboratory.
Regularly use of a blower or vacuum cleaner/mob to blow dust from the computer parts.
Avoid entering the laboratory with materials that may have dust such as shoes.

A computer technician has observed a lot of dust on computers in the computer laboratory.

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Headache, back and neck pain may result from the use of computers.

12/1/2021

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Headache, back and neck pain may result from the use of computers.

State how each of them can be minimised.
Headache

Use of filters/antiglare.
Proper lighting.
Regular break.

Back & Neck Pain

Proper/correct furniture for the computer.
Correct position of the screen.
Correct sitting posture.
Taking a break.

Headache, back and neck pain may result from the use of computers.

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State two ways of ensuring proper ventilation in a computer room

11/1/2021

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State two ways of ensuring proper ventilation in a computer room. (2 marks)

Opening windows while the computer laboratory is in use
Avoid overcrowding of learners and computers
Sufficient installation points should be installed in the room
The room should have large & enough windows & doors
Installing an air-conditioning system.
Installing cooling fans.

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State three possible causes of fire outbreak in a computer laboratory.

8/1/2021

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State three possible causes of fire outbreak in a computer laboratory.

Sources of fire in a computer laboratory

Electrical faults;
Natural causes e.g lightening;
External attacks e.g arsonists/terrorists;
Inflammable material;
Accidents.

State three possible causes of fire outbreak in a computer laboratory.

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State three functions of Un-uninterruptible Power Supply (UPS)

7/1/2021

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State three functions of Un-uninterruptible Power Supply (UPS). (3 marks)

Functions of the UPS

It regulates power from an unstable power source to the required clean stable voltage.
It prevents power surges and brownouts that might destroy the computer.
It temporarily provides power to the computer in case of the main power failure. This allows the user to save his/her work and shutdown the computer using the correct procedure.
Alerts the user of any power loss (by beeping).

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Explain two health issues that could arise from the use of an unsuitable computer desk.

6/1/2021

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Explain two health issues that could arise from the use of an unsuitable computer desk.

Problems arising from use of unsuitable computer desk.
It could lead to back problems if the desk is of an unrealistic height.
If it does not provide good positioning of the monitor, it could result in eye strain.
Wrist problems will arise if the keyboard and mouse seating positions are bad.
Injury as a result of falling computer components due to weak computer desks/ small size.

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State three risks posed by improper cabling in a computer laboratory.

6/1/2021

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State three risks posed by improper cabling in a computer laboratory.

Risk of electric shocks to the users.
Risk of tire outbreaks in the laboratory.
Risk of tripping and injuries.
Power interruption caused by stumbling on the cables.

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State three measures that should be put in place in a computer laboratory to safeguard Users’ health.

4/1/2021

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State three measures that should be put in place in a computer laboratory to safeguard Users’ health. (3 marks)

Measures to be put in place in the laboratory to safeguard user health.

All power cables must be insulated and hidden from users.
The furniture used must be of standard computer furniture.
The room should be lit with adequate lighting.
The room must be ventilated.
Computer monitor should be fitted with anti-glare to filter excess light rays emanating from the monitor.
Avoid slippery floors/cemented floors.
Controlling dust.

Anti-glare-filter-protection-screen-computer

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State two reasons why it is necessary to use standard furniture in a computer laboratory.

3/1/2021

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State two reasons why it is necessary to use standard furniture in a computer laboratory.

Prevents people from straining. .
Table sizes allow all equipment to fit.
Optimization/utilization of room space.

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Explain why the following controls should be implemented for computer based systems

3/1/2021

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(a) Explain why the following controls should be implemented for computer based systems (2mks)

Backups
To maintain a copy of original data in case the original one is lost or corrupted.
Passwords
To prevent unauthorized users from trying to access private data

(b) For each of the following give one reason why they are not allowed in a computer laboratory.

Smoking
Can start fire
Can introduce dust through smoke particles
Eating foods
Can spill and spoil computer parts like keyboard

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State two health issues that may result from prolonged use of computers

2/1/2021

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State two health issues that may result from prolonged use of computers

Exposure to electromagnetic radiation through the VDU
Eye Strain
Repetitive strain injury causing muscle fatigue etc

State two health issues that may result from prolonged use of computers

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Explain three ways by which computer users can protect their eyes from harmful emissions from the computer screen

1/1/2021

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(a) Explain three ways by which computer users can protect their eyes from harmful emissions from the computer screen

Using a glare filter
Using an LCD screen (does not emit radiation)
Not sitting in front of the computer for long hours

(b) List three factors be considered when deciding on the choice of an electronic data processing method

Suitability of accumulating data (Transmission) into batches for processing
Need for direct information retrieval and / or file interrogations
Optimization of the processing time
Time factor of the information for decision making by the managers
Cost of acquiring the necessary h/w, s/w media etc

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A computer teacher put a rule that diskettes should not be used in the computer laboratory

1/1/2021

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A computer teacher put a rule that diskettes should not be used in the computer laboratory

(a) Give a reason for the rule

Introduction of viruses and other bugs from the diskettes

(b) State two other alternatives that can be used to achieve the same objective

By disabling the diskette drive
Having up to date antivirus software that will defect and eradicate any virus in the diskette.

The computer laboratory

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State two practices to be observed in order to ensure the safety of the computer user

State two practices to be observed in order to ensure the safety of the computer user. (2mks)

State two ways through which a computer user can minimise Repetitive Strain Injuries (RSI) associated with the use of a computer.

State two ways through which a computer user can minimise Repetitive Strain Injuries (RSI) associated with the use of a computer.

A computer technician has observed a lot of dust on computers in the computer laboratory.

A computer technician has observed a lot of dust on computers in the computer laboratory.

State three precautions that need to be put in place to avoid this.

Headache, back and neck pain may result from the use of computers.

Headache, back and neck pain may result from the use of computers.

State two ways of ensuring proper ventilation in a computer room

State two ways of ensuring proper ventilation in a computer room. (2 marks)

State three possible causes of fire outbreak in a computer laboratory.

State three possible causes of fire outbreak in a computer laboratory.

State three functions of Un-uninterruptible Power Supply (UPS)

State three functions of Un-uninterruptible Power Supply (UPS). (3 marks)

Functions of the UPS

Explain two health issues that could arise from the use of an unsuitable computer desk.

Explain two health issues that could arise from the use of an unsuitable computer desk.

State three risks posed by improper cabling in a computer laboratory.

State three risks posed by improper cabling in a computer laboratory.

State three measures that should be put in place in a computer laboratory to safeguard Users’ health.

State three measures that should be put in place in a computer laboratory to safeguard Users’ health. (3 marks)

State two reasons why it is necessary to use standard furniture in a computer laboratory.

State two reasons why it is necessary to use standard furniture in a computer laboratory.

Explain why the following controls should be implemented for computer based systems

(a) Explain why the following controls should be implemented for computer based systems (2mks)

(b) For each of the following give one reason why they are not allowed in a computer laboratory.

State two health issues that may result from prolonged use of computers

State two health issues that may result from prolonged use of computers

Explain three ways by which computer users can protect their eyes from harmful emissions from the computer screen

(a) Explain three ways by which computer users can protect their eyes from harmful emissions from the computer screen

(b) List three factors be considered when deciding on the choice of an electronic data processing method

A computer teacher put a rule that diskettes should not be used in the computer laboratory

A computer teacher put a rule that diskettes should not be used in the computer laboratory

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​State two practices to be observed in order to ensure the safety of the computer user. (2mks)

State two ways through which a computer user can minimise Repetitive Strain Injuries (RSI) associated with the use of a computer.

A computer technician has observed a lot of dust on computers in the computer laboratory.

State three precautions that need to be put in place to avoid this.

Headache, back and neck pain may result from the use of computers.

​State two ways of ensuring proper ventilation in a computer room. (2 marks)

State three possible causes of fire outbreak in a computer laboratory.

​State three functions of Un-uninterruptible Power Supply (UPS). (3 marks)

​​Functions of the UPS

Explain two health issues that could arise from the use of an unsuitable computer desk.

State three risks posed by improper cabling in a computer laboratory.

​​State three measures that should be put in place in a computer laboratory to safeguard Users’ health. (3 marks)

State two reasons why it is necessary to use standard furniture in a computer laboratory.

(a) Explain why the following controls should be implemented for computer based systems (2mks)

​(b) For each of the following give one reason why they are not allowed in a computer laboratory.

State two health issues that may result from prolonged use of computers

​(a) Explain three ways by which computer users can protect their eyes from harmful emissions from the computer screen

​(b) List three factors be considered when deciding on the choice of an electronic data processing method

​A computer teacher put a rule that diskettes should not be used in the computer laboratory

Categories

Archives

State two practices to be observed in order to ensure the safety of the computer user. (2mks)

State two ways of ensuring proper ventilation in a computer room. (2 marks)

State three functions of Un-uninterruptible Power Supply (UPS). (3 marks)

Functions of the UPS

State three measures that should be put in place in a computer laboratory to safeguard Users’ health. (3 marks)

(b) For each of the following give one reason why they are not allowed in a computer laboratory.

(a) Explain three ways by which computer users can protect their eyes from harmful emissions from the computer screen

(b) List three factors be considered when deciding on the choice of an electronic data processing method

A computer teacher put a rule that diskettes should not be used in the computer laboratory