Because People want to know things...
Yes, you can ask as many questions as you want on WikiAnswers. Also, it never hurts to ask/answer many questions also.
no there is not
Some of the users at WikiAnswers are professionals in their area, and some are not. When you ask a question, everyone has the opportunity to review and answer.
No there is not a limit, you can ask as many questions as you want as long as they are appropriate questions.
There is no limit on the number of questions you can ask; the more the better.
As many as you want and are capable of asking.
WikiAnswers visitors ask questions. You wrote this one! :-)
WikiAnswers doesn't ask the questions. Users and visitors ask the questions. They are hoping that someone can help them with an answer.
Yes! One reason we have WikiAnswers is to ask questions!
To get a good answer.
You don't ask questions on wikipedia, but you can ask questions on wikianswers.
There are many websites similar to WikiAnswers which you can ask questions on. Quora is very similar to WikiAnswers except that it has more features, and a smaller user base. Aardvark is another Q&A service that is designed to get answers fast and it works well, but you can't search for questions on it that have already been answered. Yahoo answers is also like WikiAnswers, except it allows people to post separate answers to questions rather than have everyone edit one answer.