Question.com utilizes a large public forum to answer questions, so it altogether depends on the type of question asked and the education of the user who answers. As with any open forum, user-generated content, there are risks of getting unreliable information.
In its terms and conditions section, Question.com states that it does not hold accountability over the submissions on its website. There is no full-proof means of assuring the answers are correct. Therefore, a survey or opinion type of question may be better fitting for this site. Question.com may not a good source of information for a question which requires specific knowledge.