Dr S Bhatia

there may be several reasons. First question is: Where are these image files actually located?
If they are on one server while moodle on another server, then make sure URL linking is correct. Then make sure that the other server does not have  'hot link protection' turned on (HotLink protection prevents other websites from directly linking to files (as specified below) on your website. Other sites will still be able to link to any file type that you don't specify below (ie. html files). An example of hotlinking would be using a <img> tag to display an image from your site from somewhere else on the net.)

Another probable one that strikes me is: the link of these images has been placed incorrectly and probably(somehow) refers to that comp which is yours and thus works only on ur PC.

try this
upload a file on ur moodle website at (for e.g. at wwwroot/images/testimage.jpg (windows) or blah/blah/public_html/some folder/testimage.jpg

Then try a raw access by typing this link in a browser from a student's PC
If the image does not appear- server settings need to be checked
If the image appears, your linking pathways need to be checked.
Regards

u gotta give us a little more detail abt ur problem chum
couldn't make much from what you wrote

dont worry abt individual questions.
when u will make the quiz, the quiz settings will be the final settings, overriding the individual settings.
try it.

go to
http://www.yoursite.com/moodle/admin/module.php?module=quiz

or

login as admin >> click on configuration >> click on modules >> see the quiz module and click on the last column 'settings'>> options will appear>> these will become your default options.

HELLO
 All my knowledge of SCORM has come from this discussion page but i have heard it is a very useful thing.
So i just downloaded 'reload' (windows version) and its manual.
I wish to ask a question that may appear silly to experts.
Since this scorm package of mine is windows based, if i prepare anything in it and upload it to my moodle site, (which runs on a linux server) will the scorm package be compatible or not? or will i have to prepare a scorm using linux version of 'reload' and then only will it become usable on my linux-server-based moodle site?