hello pushpa_33.
rules are simple.
here are 8 simple rules of crt display:
1. do not drop water on the crt display. you will get zapped big time.
2. do not drop the display into the water. it'll explode and you will get zapped, fried, shocked big time.
3. do not drop the display, period.
4. do not touch the display if you build up too much static. you will get zapped.
5. make sure the refresh rate if 72+ Hz, otherwise your eyes will hurt a lot.
6. do not run the crt on max resolution. your eyes will get zapped.
7. make sure you hook up the display to the right port, otherwise you'l get za...... well.. get no display.
8. if this is a homework assignment, use wikipedia and the reference pages it links, or google.