<p>I'm not sure there is a 'too many' in a general sense.  Let me make a couple suggestions:</p>
<ol>
<li><p>Try to keep your threads consistent and manageable.</p>
<p>I think it's OK to put more than one question into the same thread, when the questions are closely related, or are variations on a theme.  When there are many questions that aren't closely related, the thread is at risk of being 'too broad'.  Remember also that the longer a question statement is, the fewer people will actually read all the way through it.</p>
</li>
<li><p>It is often appropriate to post a set of threads in a series over time.</p>
<p>There can be a logical ordering of questions such that answering one provides some information about the next, etc.  I would think about asking questions one thread at a time as you learn more.  You don't necessarily need to wait a week in between questions, but I probably wouldn't post more than a couple at a time, even if they are wholly unrelated.</p>
</li>
</ol>
