Now you can easily use Twitter Bootstrap Collapse feature in your WordPress blog content. The feature allows you to insert collapse titles inside post content which when clicked instantly drops down and displays your hidden text and when clicked again the test goes off.
Creating FAQs for a website, product or service etc is a common thing. Most of the WordPress users create a simple page showing a list of FAQs in there. Today I encountered a fine working WordPress plugin by norcross specially created for adding and managing FAQs in WordPress. So use it because it gives a better experience than creating simple WP page for FAQs.