WorksheetsChapter 8.1 Quiz
Total questions: 12
Worksheet time: 6mins
What is a common cause of back and neck pain when using a computer?
Sitting in a poor posture for long periods
Using an ergonomic chair
Stretching too often
Using headphones
Eye strain can be reduced by:
Increasing screen brightness
Taking regular breaks
Sitting closer to the screen
Using smaller text sizes
Headaches when using computers are usually caused by:
Bad posture
Poor lighting and screen glare
Strong air conditioning
Using wireless devices
Ozone irritation may be caused by:
The heat from the CPU
Laser printers and photocopiers
Loud noises
Power cables
Which of the following prevents electrocution?
Touching plugs with wet hands
Checking wire insulation regularly
Using multiple adapters
Placing cables under carpets
Which of the following is a tripping hazard?
A loose cable on the floor
A computer on the table
A monitor screen
A wall plug
What is the main function of an RCB (Residual Current Breaker)?
Reduces internet lag
Prevents electric shock
Boosts Wi-Fi signal
Cools the computer
Fire hazards in computer labs are often caused by:
Overloaded power sockets
Air conditioning
Small monitors
Short cables
Which situation BEST shows good ergonomic practice?
Monitor is at eye level, feet flat on floor, wrists straight
Monitor above head level, legs crossed, wrists bent
Monitor below desk, neck bent
Keyboard on lap, monitor far away
Why do CRT monitors cause more eye strain than LCD screens?
They use more electricity
They produce flicker at lower refresh rates
They show fewer colours
They are smaller
A teacher finds that some students are plugging multiple extension cords into one socket. Why is this dangerous?
It slows down data transmission
It increases fire risk from overloading
It damages the cables instantly
It makes devices lag
During a small electrical fire in the lab, what should be done FIRST?
Throw water on it
Unplug devices if safe and use CO₂ extinguisher
Evacuate immediately and close all windows
Cover it with a cloth
