safety computer Flashcards
pc rules
A computer user is a person who uses a video display terminal for…
at least twenty hours per week
What is the law on breaks when working with computers?
15 minute rest break every two hours
What is the correct posture when sitting at a computer?
keep your hips far back in the chair in order to reduce the compressive forces on your lower back
Adjust the height of your chair so…
your shoulders are relaxed, your arms and elbows are in a slightly open position (more than 90°)
Adjust the monitor height so…
the top of the computer screen is level with your eyes
The back of the chair should be somewhat reclined at a…
90- to 110-degree angle to sit in the most relaxed position
The monitor should be placed directly in front of you and no closer than…
50 – 70 cm from your eyes
The mouse and other useful objects should be placed…
near the keyboard
to reduce the muscle load while keying, you should…
let your elbows lay on your work desk
Eyestrain signs such as blurred vision, watery eyes and burning eyes are usually…
temporary and reversible symptoms
One of the main causes of eyestrain is…
wrong PC and monitor settings
What is a “Refresh” option?
it is used to update the display or reproduce the look of the desktop after a change
How to prevent computer eyestrain…
checking the characters readability
To eliminate glare on your screen, windows should be
parallel to your view on the screen
Follow this rule to relax your eye muscles:
every 20 minutes look at an object 20 meters away for at least 20 seconds (20-20-20 rule)
Before using a new software, you’d better
take some time to acquire necessary skills
A macro is…
an automated input sequence that imitates keystrokes or mouse actions
To avoid any contact with live electrical parts, you’d better:
not to perform maintenance work – it is the task of trained staff
If there are several plugs to be connected to the mains…
if necessary, use power strips being careful to choose the most suitable one
After a prolonged sitting at a desk or computer terminal, the following exercise can help relaxing your muscles…
bend your back downwards to feel a stretch in the back muscles
