One way to add images to a quiz, survey, or other input form that uses the Mad Blanks Create Single Record module is to enable the module's parameter labeled, "Show the text that will be displayed before and after each form field according to the category configuration" by setting it to Yes. In version 1.1.0 Beta 2, this parameter is the 10th from the bottom.
Then, when editing the Mad Blanks category for your quiz (or input form), put the HTML needed to display the image in either the Text/HTML that comes before the field or the Text/HTML that comes after the field for the corresponding input prompt.
The most basic HTML needed to display an image looks something like this:
<img src="http://www.madblanks.org/templates/go-vista-simple/images/titlebuttonleft.jpg" />