Click the case title to open it in the Case Viewer. The quiz section appears on the left, below the case text.
If you haven't already, turn on Training Mode.
You will see the first quiz question. Multiple-choice questions will look like this:
After choosing an answer, you'll get immediate feedback.
After answering, click the "next" link to go to the next question. If there are questions in other sections, you will see a prompt to visit those sections.