Quiz I Answers

1. Why are ergonomics and proper computer use important?

To avoid a strain injury.

By the way, ergonomics, the study of systems and objects for human use, comes from the Greek words ergon (meaning "work") and nomos (meaning "rules" or "natural laws").

2. What is the most important guideline to avoid serious injury while using the computer?

Listen to your body.

Your body will send you signals (such as soreness or numbness) when it is being injured. You should be taking frequent, periodic rest breaks. Use them to "check in" with your body, and pay attention to any warning signs it might be sending.

3. What is the proper position for feet and legs?

Feet flat on the floor (or foot rest). Legs straight, in a natural position.

Old rules dictated knees bent at a 90 degree angle. It's actually better to vary the position occasionally, rather than holding a fixed, rigid position for a long period of time.

4. What is the proper position for arms and hands?

Upper arms down alongside the body, elbows bent no less than 90 degrees (avoid nerve compression), forearms close to parallel, and wrists straight as possible. Wrists should be elevated, not resting on table.

5. What is the proper placement of the computer monitor?

At or slightly below eye height (so that you can view without bending the neck). Monitor should be as far back as comfortable, at least 18 to 24 inches away from eyes. The further away, the less strain on the eye.

6. What does the CAPS LOCK key do?

When engaged, the main keyboard area sends upper case letters instead of lower case letters. There typically is a light in the top-right corner of the keyboard that illuminates when CAPS LOCK is on.

7. Normally, how should CAPS LOCK be set?


When you need to capitalize a letter (say in a name or start of the sentence), use the SHIFT key.

8. What does the NUM LOCK key do?

When engaged, the numeric keypad sends numeric digits instead of commands (page up, end, etc.). Typically, there is another light in the top-right corner of the keyboard that illuminates when NUM LOCK is on.

9. Normally, how should NUM LOCK be set?


That way you can use the keypad for numeric data entry. The commands are available to you in the central area of the keyboard.

10. When the computer asks you for some information (such as a name or telephone number), which key do you use to indicate when you are through typing?

The ENTER key.

Sometimes there also is a button (marked OK or similar) that can be clicked with a mouse to indicate you are done.

11. What is a cursor?

It is a symbol on the screen (often a bar or a box, sometimes flashing) that indicates where the characters you type are going to go.

12. What is a mouse pointer?

It is a mark on the screen that you manipulate with the mouse (or other pointing device).

The mouse pointer is not the same thing as the cursor, although one use of the mouse pointer is to select a spot where you want the cursor to go.