Hello, here is a tutorial about How to make online quizzes in Moodle, please try and have a look, http://www.wikihow.com/Make-Online-Quizzes-in-Moodle
A video tutorial about how to make a Quiz in Moodle:
BTW, Moodle already has a Quiz module allowing the instructors to design and set quizzes consisting of a large variety of Question types in the easiest way.
You also could use some other SCORM quiz tool to create quiz for your Moodle, such as Quiz Creator, you could easily add image and other multimedia file to your quiz.