bauc

WPQuiz allows you to create a quiz (one or more questions/answers) and add it to any post/page using the built-in tags [wpquiz id=?] and [wpquiz_text][/wpquiz_text]. After installing, you can create a new quiz or edit the sample one by accessing it from the admin Dashboard->Settings->WPQuiz. Once you’ve created a quiz there you can easily add it to 
a post/page from the Add/Edit post/page editor’s WPQuiz meta box. The plugin stores its questions/answers in two tables in the database.
The answers are not stored, only checked and shown back to user. Storing and/or giving more feedback is planned for the next release, comments welcome.

WPQuiz

WPQuiz allows you to add a simple quiz/questions to any post/page

ssvadim

With <a href="http://www.100vadim.com/ssquiz/" rel="nofollow ugc">SSQuiz</a> you can make quizzes really fast. Add questions/quizzes, rearrange questions, edit answers, insert multimedia in questions – all of this can be done on single page within several seconds. Also one can edit welcome/finish/email templates using html if it’s needed. Quiz automatically determines what type of test user creates (choose-correct, fill-blank or question with several correct answers). Once quiz is over, user can walk through their answers and see correct answers.
Features include:
<ul>
<li>Easy and fast quiz creation</li>
<li>Multimedia in questions</li>
<li>Multiple types of questions</li>
<li>Timer</li>
<li>Email sending to user or teacher</li>
<li>Plugin API (See FAQ)</li>
<li>Localization ready (Currently added Russian and Persian translation)</li>
</ul>

SS Quiz

With this plugin administrator can easily and fast create complicated tests and user can't relax, answering this questions.

WPQuiz vs SS Quiz